Hey there!
Stock solution:
Concentracion bromide = 0.128 M
initial solution in volumetric flask = 450 µl
So , moles of bromide present:
450 µl in liters :
1 µl = = 1*10⁻⁶ liters
450 * ( 1*10⁻⁶ ) = 0.00045
0.128 * 0.00045 => 57.6 * 10⁻⁶ moles
Now volume final is 25 mL , in liters : 0.025 L ou 25*10⁻³
so new bromide concentration:
57.6*10⁻⁶ / 25*10⁻³=> 2.304*10⁻³ M
To find the bromide concentration in the diluted solution, use the formula for dilution C1V1 = C2V2. Your values are C1= 0.128 M, V1= 0.45 ml, and V2= 25 ml. Solve the equation for C2 to obtain the required bromide concentration.
Explanation:The bromide concentration in the diluted solution can be calculated using the formula for dilution: C1V1 = C2V2. Where C is concentration, V is volume, 1 refers to initial conditions, and 2 refers to conditions after dilution.
Here, C1 is 0.128 M (the initial concentration of bromide in the stock solution), V1 is 450 μl (the volume of the aliquot), V2 is 25 ml (the volume of the diluted solution in the volumetric flask). Inserting these values into the formula, we need to find C2 (unknown concentration of diluted solution).
Therefore, C2 = C1V1 / V2.
Before doing calculations, make sure that all volumes are in the same unit. In this case, convert μl to ml: 1μl = 0.001 ml, so 450 μl = 0.45 ml.
The calculation becomes: C2 = (0.128 M * 0.45 ml) / 25 ml, which, when calculated, provides the concentration of bromide in the diluted solution.
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Find the number of moles of water that can be formed if you have 178
mol of hydrogen gas and 84 mol of oxygen gas. Please give an explanation why. Thanks!
Answer:- 168 moles of water are formed.
Solution:- The balanced equation for the formation of water from hydrogen and oxygen gases is:
[tex]2H_2(g)+O_2(g)\rightarrow 2H_2O(l)[/tex]
From this equation hydrogen and oxygen react in 2:1 mol ratio.
We have been given with 178 moles of hydrogen and 84 moles of oxygen. We need to figure out the limiting reactant first. For this let's either calculate the moles of oxygen required to react completely with 178 moles of hydrogen or the moles of hydrogen required to react completely with 84 moles of oxygen.
Let's say we calculate the moles of oxygen required to react completely with 178 moles of hydrogen:
[tex]178molH_2(\frac{1molO_2}{2molH_2})[/tex]
= [tex]89molO_2[/tex]
From the above calculations, 89 moles of oxygen are required to react completely with 178 moles of hydrogen but only 84 moles of oxygen are available, It means oxygen is the limiting reactant and the product yield depends on it.
There is 1:2 mol ratio between oxygen and water. Let's calculate the moles of water for given 84 moles of oxygen:
[tex]84molO_2(\frac{2molH_2O}{1molO_2})[/tex]
= [tex]168molH_2O[/tex]
So, the reaction of 178 moles of hydrogen and 84 moles of oxygen gives 168 moles of water.
Final answer:
To determine the number of moles of water that can be formed from 178 mol of hydrogen gas and 84 mol of oxygen gas, the balanced chemical equation 2 H₂ + O₂ → 2 H₂O is used. Oxygen is the limiting reactant with only 84 mol available, resulting in the production of 168 moles of water.
Explanation:
To find the number of moles of water that can be formed from 178 mol of hydrogen gas (H₂) and 84 mol of oxygen gas (O₂), we need to use the balanced chemical equation for the formation of water:
2 H₂(g) + O₂(g) → 2 H₂O(g)
According to this equation, 2 moles of H₂ react with 1 mole of O₂ to produce 2 moles of H₂O. The limiting reactant is the one that will run out first and determine the amount of the product formed. With 178 mol of hydrogen available, we would need 89 mol of oxygen to fully react with all the hydrogen (since the ratio is 2:1). However, since we only have 84 mol of oxygen, oxygen is the limiting reactant.
We can calculate the moles of water produced as follows:
84 mol O₂ (2 mol H₂O / 1 mol O₂) = 168 mol H₂O
Therefore, 168 moles of water can be formed from 178 mol of hydrogen gas and 84 mol of oxygen gas.
For each domain, list one example of an organism that is found there.
A student has a piece of aluminum metal. Which is the most reasonable assumption the student could make about the metal?
A.
It would only conduct electricity if it were melted.
B.
It could melt and boil if thrown into a campfire.
C.
It would break if it were hit with a hammer.
D.
It will always have the exact same shape.
E.
It could be stretched into a thin wire.
The metals are elements which have low ionization potential and can lose electrons easily
the other physical characteristics associated with them and hence with Aluminium are
a) they can conduct electricity in molten state, hence It would only conduct electricity if it were melted.
b) It could be stretched into a thin wire. It means it is ductile.
In case of given aluminium metal the correct answer is
it could be stretched to thin wire
(E) It could be stretched into a thin wire.
- Aluminum is a ductile metal, meaning it can be stretched into thin wires without breaking.
- Let's analyze each option to see why (E) is the most reasonable assumption:
- (A) Aluminum conducts electricity well even in its solid state, not just when melted, so this assumption is not accurate.
- (B) Aluminum has a high melting point (660.32°C or 1220.58°F), much higher than typical campfire temperatures, so it would not melt or boil if thrown into a campfire.
- (C) Aluminum is malleable and ductile, meaning it can be hammered into different shapes without breaking easily.
- (D) Aluminum can maintain its shape under normal conditions, but it can be reshaped.
- (E) Aluminum is known for its ability to be drawn into thin wires, which is a characteristic of ductile metals.
Therefore, option (E) is the most reasonable assumption about aluminum metal among the given choices.
Match the correct simple with the correct elements of safety
This question involves chemistry, specifically the changes in a chemical reaction. Determine the signs of potential changes for each element by considering if they are gaining or losing electrons. Apply this process carefully and consistently to all elements.
Explanation:In the context of the question, you need to determine the signs of potential changes for each element, using the four points discussed together with Figure 21.26. This involves identifying and examining each element separately. For example, if an element is gaining electrons in a chemical reaction, it will exhibit a negative change in potential, due to the increase in negatively charged particles.
On the other hand, if an element is losing electrons (being oxidized), it will show a positive change in potential as the positively charged particles increase. Be sure to apply this analyzation carefully and consistently to all elements in your examination to ensure accurate results.
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Rank the metals from most reactive (1) to least reactive (3) silver, strontium, and technetium
Answer:
1 = strontium
2 = technetium
3 = silver
Explanation:
Strontium is present in 2 group of periodic table. It is alkaline earth metal. It is most reactive element and can not found free in nature. it is insoluble in water but react with water and form strontium hydroxide and hydrogen gas is also produced. It is radioactive element.
It is similar to the calcium and can incorporated into bones. The food rich with strontium is used to avoid the osteoporosis. It is found in leafy vegetables, grains, sea foods etc.
In given series strontium is highest in reactivity then technetium, while the technetium is more reactive than silver. The silver is less reactive as compared to both given elements.
Answer:
1. Strontium 2. Technetium 3. Silver
Explanation:
25 Points
Question
How does the structure of a carbon atom enable it to form large molecules?
Available Choices
[A] Each carbon atom can be stable with one, two, three, or four bonds because of how its valence electrons are arranged.
[B] Each carbon atom can bond with several other carbon atoms because of how many valence electrons it has.
[C] Each carbon atom donates its electrons to other atoms, including atoms of noble gases and halogens.
[D] Each carbon atom forms either double or triple bonds with surrounding hydrogen atoms.
Try your best, this is important, 25 points and brainliest answer if you get it right!
The answer is (B).
Each Carbon atom can bond with several other carbon atoms because of how many valence electrons it has.
Carbon atom has four valence electrons, so each single carbon can form four bonds in total either with other carbons or some other atoms. So, a chain can be formed with carbon linked to another and then so on.
The bond between Carbon to another Carbon is strong and stable so the compounds tend to be stable enough to exist.
Answer:
B. Each carbon atom can bond with several other carbon atoms because of how many valence electrons it has.
Explanation:
Carbon atom has four valence electrons, so each single carbon can form four bonds in total either with other carbons or some other atoms. So, a chain can be formed with carbon linked to another and then so on.
The bond between Carbon to another Carbon is strong and stable so the compounds tend to be stable enough to exist.
Is spoiling food a physical or chemical change
Spoiling food is a chemical change.
Spoiling food is a chemical change and the composition of the substance does changes to form new substances.
How do we explain?In a physical change, the composition of the substance does not change. For example, if you cut an apple in half, the apple will change shape, but the molecules that make up the apple will still be the same.
In a chemical change, the composition of the substance does change. For example, when food spoils, the food molecules react with each other to form new substances with different properties. These new substances may have a differe6t color, smell, or taste than the original food. They may also be harmful to eat.
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Meteorology is best defined as the study of
Meteorology is the study of the atmosphere and atmospheric phenomena, focusing on predicting the weather in the short term to protect lives and property. This scientific field uses various data and modeling techniques to forecast weather patterns and is closely related to climatology and atmospheric science.
Meteorology is defined as the study of the atmosphere and the various phenomena within it, including the processes that cause weather conditions. Specifically, meteorologists analyze the movement of air masses, cloud formation, and precipitation, all of which play a central role in shaping our day-to-day weather.
The goal of meteorology is not only to understand these atmospheric processes but also to predict weather patterns and changes. This predictive ability is crucial for safeguarding lives, property, and economic activities that may be affected by weather events. Meteorology utilizes data from air pressure and temperature measurements, among others, and employs modeling techniques to produce weather forecasts.
It is a discipline that significantly overlaps with other branches of atmospheric science, such as climatology and atmospheric chemistry. While climatology focuses on longer-term weather patterns and trends over decades or even centuries, meteorology primarily deals with the short-term prediction of weather. These weather predictions, enabled by the advances in measurement and analysis technologies such as radars and satellites, play a vital role in daily life and in preparing for extreme weather events.
Which TWO properties are characteristic of iconic compounds?
brittleness
ductility
high melting point
low boiling point
malleability
Some characteristics of Ionic compounds by Mimiwhatsup: brittle, high melting point, conducts electricity when molten or dissolved in water.
Answer : The correct options are, brittleness and high melting point
Explanation :
Ionic compound : Ionic compounds are the compounds which are formed when a metal cation bonded with non-metal anion. The metal cation and non-metal anion bonded with an electrostatic force of attraction.
The properties of ionic compounds are :
Ionic compounds are brittle and hard. They breaks easily into small pieces.
They have high melting point and boiling point.
They conduct electricity in liquid state not in solid state.
Hence, the brittleness and high melting point properties are the characteristic of ionic compounds.
Which releases H+ cations when place in water?
A) CH_4
B) NaHC0_3
C) HCI
D) CO_2
C) [tex]\text{HCl}[/tex] hydrochloric acid and, in case that the question allows for more than one choices, D) [tex]\text{CO}_2[/tex] carbon dioxide as well.
Methane molecules [tex]\text{CH}_4[/tex] are nonpolar and barely dissolve in water.
Sodium hydrocarbonate [tex]\text{Na}\text{HCO}_3[/tex] undergoes hydrolysis to release hydroxide ions [tex]\text{OH}^{-}[/tex] that can end up consuming [tex]\text{H}^{+} \; (aq)[/tex]:
[tex]\text{NaHCO}_3 \; (aq) \to \text{Na}^{+} \; (aq) + \text{HCO}_3^{-} \; (aq)\\\text{HCO}_3^{-} \; (aq) + \text{H}_2\text{O} \; (l) \leftrightharpoons \text{H}_2\text{CO}_3\; (aq) + \text{OH}^{-} \; (aq)[/tex]
Hydrochloric acid, a strong acid, ionizes to produce protons [tex]\text{H}^{+} \; (aq)[/tex] and chloride ions when dissolved in water:
[tex]\text{HCl}\; (aq) \to \text{H}^{+} \; (aq) + \text{Cl}^{-} \; (aq)[/tex]
Carbon dioxide reacts with water to produce hydrocarbonic acid, a weak acid that slightly ionizes, also producing protons [tex]\text{H}^{+} \; (aq)[/tex] but to a significantly lesser extent than hydrochloric acid does.
[tex]\text{CO}_2\; (g) + \text{H}_2\text{O} \; (l) \leftrightharpoons \text{H}_2\text{CO}_3\; (aq)\\\text{H}_2\text{CO}_3\; (aq) \leftrightharpoons \text{H}^{+}\; (aq) + \text{HCO}_3^{-} \; (aq)[/tex]
D) Co2!
it reacts with water to form carbonic acid...
that has H+ ions!
I need help with my chemistry homework. SHOW WORK
1) The density of tin (Sn) is the 5.75 g/cm^3. How many cubic decimeters (dm^3) does 17.2 kg of Sn occupy?
2) If half a liter (500 mL) of olive oil weights 425g, what is its density?
3) The density of silver is 10.5 g/cm^3. What is the mass of 0.987 dm^3 of silver ?
1. 17.2kg=17200g
so knowing that d=m/V, use V=m/d to calculate the volume
v=17200/5.75
and then devide by 1000 to convert cm3 to dm3 and the answer will be in dm3
2. d=m/v
v=0.5l
m=425g
so use the formula and you will get d=425/0.5=850g/l
3. use d=m/v again, but not before rewriting the formula for volume: m=vd and convert dm3 to cm3
1dm3=1000cm3
so 0.987dm3 =987 cm3
now m=987cm3 * 10.5g/cm3 and the answer will be in grams
The volume occupied by 17.2 kg of tin is 2.99 cubic decimeters.
The density of olive oil is 0.850 g/mL.
The mass of 0.987 cubic decimeters of silver is 10,365.5 grams.
Explanation:
Given:
The density of tin is [tex]5.75 g/cm^3[/tex]A 500 mL of olive oil weighs 425 g.The density of silver [tex]10.5 g/cm^3[/tex]To find:
The volume in cubic decimeters of 17.2 kg of tin.The density of olive oil.Mass of [tex]0.987 dm^3[/tex] of silverSolution:
1.
The mass of tin = m = 17.2 kg
[tex]1 kg = 1000 g\\m=17.2 kg=17.2\times 1000 g=17,200 g[/tex]
The volume of tin = v
The density of tin = d = [tex]5.75 g/cm^3[/tex]
[tex]d=\frac{m}{v}\\\\5.75g/cm^3=\frac{17,200 g}{v}\\\\v=\frac{17,200 g}{5.75g/cm^3}=2,991.3 cm^3\\\\1 cm^3= 0.001 dm^3\\\\v=2,991.3 cm^3=2,991.3\times 0.001 dm^3\\\\=2.9913 dm^3\approx 2.99 dm^3[/tex]
The volume occupied by 17.2 kg of tin is 2.99 cubic decimeters.
2.
The mass of an olive oil = m = 425 g
The volume of an olive oil = v = 500 mL
The density of an olive oil =d
[tex]d=\frac{m}{v}\\=\frac{425 g}{500 mL}=0.850 g/mL[/tex]
The density of olive oil is 0.850 g/mL.
3.
The mass of silver = m =
The volume of silver = v = [tex]0.987 dm^3[/tex]
[tex]1 dm^3=1000 cm^3\\v=0.987 cm^3=0.987\times 1000=987 cm^3[/tex]
The density of silver = d =[tex]10.5 g/cm^3[/tex]
[tex]d=\frac{m}{v}\\\\10.5 g/cm^3=\frac{m}{987 cm^3}\\\\m=10.5 g/cm^3\times 987 cm^3=10,365.5 g[/tex]
The mass of 0.987 cubic decimeters of silver is 10,365.5 grams.
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compounds with 2 ions bonded are called
Compounds with 2 ions bonded are called ionic compounds.
They are held together by the attractions between the positive and negative ions.
The image shows the representation of an unknown element in the periodic table.
A square is shown. Inside the square ten is written at the top righthand side. To the middle left side, Symbol is written. Below it Name is written. And further below near the bottom edge of the square, twenty point one seven nine seven is written.
Based on the representation, which of the following statements about the element is true?
The total number of protons plus electrons is 10.
The number of neutrons in an atom of the element is 20.
The sum of the masses of protons and neutrons is 20.1797.
The mass of only the protons in the nucleus is 20.1797.
Answer:
the sum of the masses of protons and neutrons is 20.1797
Explanation:
The sum of the masses of protons and neutrons is 20.1797. The Option C.
What is the total mass of protons and neutrons?The total mass of protons and neutrons in an atom, known as the atomic mass or mass number can be determined by adding the individual masses of protons and neutrons.
In the given representation, the value "20.1797" likely represents the atomic mass of the element, which includes both protons and neutrons. This value corresponds to the sum of the masses of all the particles in the nucleus of the atom.
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When a substance changes from one phase to another, which of the following occurs? A. The substance loses or gains heat. B. The average kinetic energy of the substance changes. C. The temperature of the substance changes. D. The molecular motion of the substance changes.
Answer:
A. The Substance Loses or Gains Heat
Explanation:
Plato 5/5
If 1.00 mol of argon is placed in a 0.500-L container at 20.0 ∘C , what is the difference between the ideal pressure (as predicted by the ideal gas law) and the real pressure (as predicted by the van der Waals equation)?
For argon, a=1.345(L2⋅atm)/mol2 and b=0.03219L/mol.
Hey There!
ideal gas law :
PV = nRT
P = nRT/V
P = (1*0.082)(18+273)/(0.5) = 47.724 atm
For VDW :
(P + a(n/V)²)(V - nB) = nRT
P = nRT/(V - nB) - a(n/V)²
P = 1*0.082*(18+273) / (0.5-1*0.03219) - 1.345*( 1/0.5 )² = 45.62
P = 45.62 atm
Pdif = P2-P1 = 47.724 - 45.62 = 2.104 atm
Final answer:
The difference between the ideal pressure and the real pressure of argon in the given conditions is found by using both the ideal gas law and the van der Waals equation, then subtracting the ideal pressure from the real pressure.
Explanation:
When comparing the ideal gas law with the van der Waals equation, we are looking at two different models for describing the behavior of gases. The ideal gas law assumes that gas particles do not interact and have no volume, while the van der Waals equation accounts for the finite volume of gas particles and the attractive forces between them, which can cause deviations from ideal behavior at high pressures and low volumes or high temperatures.
To find the ideal pressure, use the ideal gas law PV = nRT, where P is the pressure, V is the volume, n is the number of moles, R is the ideal gas constant (0.0821 L·atm/(K·mol)), and T is the temperature in Kelvin. Substituting the values into this equation, we can calculate the ideal pressure for argon.
The real pressure of argon can be estimated using the van der Waals equation, which is given by (P + n²a/V²)(V - nb) = nRT, with a and b being the van der Waals constants for argon. Subtracting the ideal pressure from the real pressure will give us the difference between the two.
A sample of 0.6760 g of an unknown compound containing barium ions (ba2+) is dissolved in water and treated with an excess of na2so4. if the mass of the baso4 precipitate formed is 0.4105 g, what is the percent by mass of ba in the original unknown compound?
Answer: 35.72 % of Barium ions will be present in the original unknown compound.
Explanation: The reaction of Barium ions and sodium sulfate is:
[tex]Na_2SO_4(aq.)+Ba^{2+}(aq.)\rightarrow BaSO_4(s)+2Na^+(aq.)[/tex]
Here, Sodium sulfate is present in excess, Barium ions are the limiting reagent because it limits the formation of product.
Now, 1 mole of barium sulfate is produced by 1 mole of Barium ions.
Molar mass of Barium sulfate = 233.38 g/mol
Molar mass of Barium ions = 137.327 g/mol
233.38 g/mol of barium sulfate will be produced by 137.323 g/mol of Barium ions, so
0.4105 grams of barium sulfate will be produced by = [tex]\frac{137.327g/mol}{233.38g/mol}\times 0.4105g[/tex] of Barium ions
Mass of barium ions = 0.2415 grams
To calculate percentage by mass, we use the formula:
[tex]\% mass=\frac{\text{Mass of solute (in grams)}}{\text{Total mass of the solution(in grams)}}\times 100[/tex]
Mass of the solution = 0.6760 grams
Putting the value in above equation, we get
[tex]\% \text{ mass of }Ba^{2+}\text{ ions}=\frac{0.2415g}{0.6760g}\times 100[/tex]
% mass of Barium ions = 35.72%.
The percentage by mass of barium ion (Ba²⁺) in the unknown compound is 35.7%
We'll begin by writing the balanced equation for the reaction. This is given below:
Ba²⁺(aq) + Na₂SO₄(aq) —> BaSO₄(s) + 2Na⁺(aq)
Molar mass of Ba²⁺ = 137 g/mol
Mass of Ba²⁺ from the balanced equation = 1 × 137 = 137 g
Molar mass of BaSO₄ = 137 + 32 + (16×4)
= 233 g/mol
Mass of BaSO₄ from the balanced equation = 1 × 233 = 233 g
Thus,
From the balanced equation above,
137 g of Ba²⁺ reacted to produce 233 g of BaSO₄.
Next, we shall determine the mass of Ba²⁺ that reacted to produce 0.4105 g of BaSO₄. This can be obtained as follow:
From the balanced equation above,
137 g of Ba²⁺ reacted to produce 233 g of BaSO₄.
Therefore,
X g of Ba²⁺ will react to produce 0.4105 g of BaSO₄ i.e
X g of Ba²⁺ = [tex]\frac{137 * 0.4105}{233} \\\\[/tex]
X g of Ba²⁺ = 0.2414 g
Finally, we shall determine the percentage of Ba²⁺ in the unknown compound. This can be obtained as follow:
Mass of Ba²⁺ = 0.2414 g
Mass of compound = 0.6760 g
Percentage of Ba²⁺ =?[tex]Percentage = \frac{mass of ion}{mass of compound} * 100\\\\= \frac{0.2414}{0.6760} * 100\\\\[/tex]
Percentage of Ba²⁺ = 35.7%Therefore, the percentage by mass of barium ion (Ba²⁺) in the unknown compound is 35.7%
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I need help with my assessment.
The question is...
Now, look at the segment of the graph between the two data points marked with black squares. Describe how the boiling point and melting point plots behave between these points. Be as specific as possible.
You didn't put an image. Sorry. Please put an image
What is the molarity of 70.6 g C2H6O in 2.25 L of solution
Hey there!
Molar mass C2H6O = 46.0684 g/mol
Number of moles:
n = mass of solute / molar mass
n = 70.6 / 46.0684
n = 1.532 moles
Therefore:
M = number of moles / volume ( L )
M = 1.532 / 2.25
= 0.680 M
Hope that helps!
The molarity of a solution containing 70.6 g of C2H6O in 2.25 L of solution is calculated by determining the number of moles of C2H6O and dividing by the volume in liters, resulting in a molarity of 0.6818 M.
Explanation:The molarity of a solution is calculated by dividing the number of moles of solute by the volume of the solution in liters. First, you need to find the molar mass of C2H6O, which is (2 × 12.01) + (6 × 1.008) + (1 × 16.00) = 46.07 g/mol. Next, calculate the number of moles of C2H6O in 70.6 g by using the molar mass:
Number of moles = 70.6 g / 46.07 g/mol = 1.534 moles (approximately)Then, divide the number of moles by the volume of the solution in liters to find the molarity:
Molarity = 1.534 moles / 2.25 L = 0.6818 MTherefore, the molarity of the solution is 0.6818 M.
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Within __________ minutes after a drink is consumed, all of the alcoholic content has probably been absorbed into the body. 60-90 10 to 20 90-100 20-60
Within 60–90 minutes after a drink is consumed, all the alcoholic content has probably been absorbed into the body. This means that during this time frame, the majority of the alcohol present in the drink has entered the bloodstream and is distributed throughout the body.
When an alcoholic drink is consumed, the alcohol content is absorbed into the body primarily through the gastrointestinal tract. After ingestion, the alcohol passes through the stomach and enters the small intestine, where most of the absorption takes place.
The absorption process is relatively rapid, with the majority of the alcohol being absorbed within 60–90 minutes after consumption. However, the exact timing can vary depending on several factors, including the individual's metabolism, the type and strength of the drink, the presence of food in the stomach, and other individual characteristics.
During this absorption period, the alcohol molecules are transported across the lining of the small intestine and enter the bloodstream. From there, the alcohol is distributed throughout the body, including the brain, where it exerts its effects.
After the absorption process is complete, the body begins to metabolize and eliminate the alcohol. The liver plays a crucial role in metabolizing alcohol, breaking it down into less harmful byproducts that can be excreted from the body.
It's important to note that the effects of alcohol can vary and may continue to be felt even after the absorption process is complete. Factors such as the amount consumed, individual tolerance, and the rate of alcohol metabolism can influence the duration of alcohol's effects on the body.
Hence, the timeframe of 60–90 minutes represents a general estimate for the absorption of alcohol into the body, but individual variations can occur.
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Final answer:
After consuming a drink, all of the alcoholic content is typically absorbed into the body within 20-60 minutes. This process is influenced by various factors, including the presence of food and the drink's alcohol concentration.
Explanation:
The question addresses how quickly all of the alcoholic content of a drink is absorbed into the body after consumption. The absorption rate of alcohol into the body is significant because it affects how quickly a person feels the effects of alcohol and how soon the body can begin to metabolize and eliminate it. The correct answer to the question is 20-60 minutes after a drink is consumed, all of the alcoholic content has probably been absorbed into the body. This timeframe allows for the passage of alcohol through the stomach and into the bloodstream, with variations depending on factors like the presence of food in the stomach, the alcohol concentration of the drink, and individual metabolic rates.
would it be possible to use the color of a natural indicator to measure the ph of maple syrup
Maple syrup is dark in colour.
Natural pH indicators like turmeric or morning glories generally change in colour and indicate the pH of any solution
The pH change is due to high hydronium ion concentration of hydroxide ion concentration.
The pH change is indicated by change in colour by natural indicators which is possible to be observed if we have some light coloured sample / transparent sample to be tested.
In case of maple syrup the colour is so dark that it becomes difficult to observe the colour change in any natural indicator
PLEASE ANSWER
ARE THESE CORRECTTTTTT
1. The answer is E.
2. I agree with your answers.
3. I also agree with your answers
Left Frame
The answer you have chosen is not correct. You have selected a physical property. Color is something that will not change as long as nothing chemical is done to the sample. If it is just going to sit there at room temperature in a flask and be admired, (particularly if the flask has a cork in it), then whatever you see is a physical property. The only one that isn't is E. When you burn something, there is a change. One chemical turns into something else. If you burn gasoline (for your car) then C8H18 + 13.5 02 ==> 8CO2 + 9H20 is the result. That gasoline is not easily reversible. It has changed into something else (Water and Carbon Dioxide). That's Chemical.
Middle Frame
I've never encountered these terms before. Your two examples of extensive are correct. I'm not sure about the chemical reaction. I think it is intensive, but I wouldn't bet the farm on it. A chemical reaction is going to take place no matter how much is used. You could have too much sample or too much acid, but what happens does not depend on the amount. I think you are correct.
Answer: you have placed these in the right place.
Right frame.
All four are in the right category. Very nicely done.
who suggested the Billiard Bill model and what were his conclusions about the structure of an atom?
Answer:
John Dalton.The atom is indestructible and indivisible; the atoms of a same element are all identical, and the atoms of different elements are different.Explanation:
Billiard Ball Model is the name used for the model of the atom proposed by John Dalton (1766 - 1844)
The use of this name is to refer the fact that the atom was depicted as a tiny solid and indivisible particles.
Dalton's conclusions about the structue of the atom and the matter were:
The ph of a 0.175 m aqueous solution of a weak acid is 3.52. what is ka for this acid?
Hey there!
pH = - log [ H⁺ ] = 3.52
[ H⁺ ] = 10^-pH
[ H⁺] = 10^ ( -3.52 )
[H⁺] = 3.02*10⁻⁴ M
[HA] =0.175 M
Therefore:
Ka = [ H⁺]* [A⁻] / [ HA]
Ka = (3.02*10⁻⁴)² / 0.175
Ka = 9.1204*10⁻⁸ / 0.175
Ka = 5.2*10⁻⁷
Hope that helps!
By utilizing the given pH and molarity of the weak acid solution, we calculate the concentration of ionized and non-ionized acid. Then, we apply the equilibrium constant formula to calculate a Ka value of 5.22 x 10^-9.
Explanation:The pH of the weak acid is given as 3.52. This equates to the concentration of [H+], which we can find using the formula [H+] = 10^(-pH). This gives us [H+] = 10^(-3.52) = 3.02 x 10^-4.
In a weak acid, [H+] = [A-] (the concentration of the deprotonated, or ionized, acid). Since we know the total concentration of the weak acid is 0.175 M, we can find the concentration of the un-deprotonated, or non-ionized, acid, [HA], by subtracting [H+] from this. So [HA] = 0.175 - 3.02 x 10^-4 = 0.1747 M.
Finally, knowing [H+], [A-], and [HA], we can calculate Ka, the equilibrium constant of the acid dissociation reaction, through the equation Ka = [H+][A-]/[HA]. Plugging in our numbers gives Ka = (3.02 x 10^-4)^2 / 0.1747 = 5.22 x 10^-9.
Learn more about Ka calculation here:https://brainly.com/question/27548374
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The pH of 0.10 M solution of an acid is 6. What is the percentage ionization of the acid?
6.0 %
0.00010%
10%
0.0010%
Hey there!:
HA <=> H⁺ + A⁻
pH = -log[H+] = 6
[ H⁺ ] = 10^-pH
[ H⁺] = 10 ^ -6
[ H⁺ ] = 0.000001 M
Percent dissociation:
[ H⁺ ] / [ HA]o * 100
[ 0.000001 / 0.10 ] * 100
0.00001 * 100 => 0.0010%
Answer D
Hope that helps!
1) 239Pu has a half-life of 24000 years.
If we have 10 g of 239Pu, how many grams will be left after 75000 years?
Answer in units of g.
2) The half-life of 137Ce is 30 years.
How many grams of 137Ce must be produced now to have a sample containing 37 g of 137Ce 160 years from now?
Answer in units of g.
1)
[tex]1.2 \; \text{g}[/tex]
There are [tex]75000/24000 = 25/8 = 3.125[/tex] half lives in a period of 75,000 years. The sample of plutonium-239 would thus expect a loss in mass that would results in a mass ratio of [tex](1/2)^{25/8}[/tex] which is the same as [tex]2^{-25/8} \approx 0.12 [/tex] relative to the initial mass. [tex]0.12 \times 10 \; \text{g} = 1.2 \; \text{g}[/tex] of plutonium-239 would thus remain in the initial [tex]10 \; \text{g}[/tex] sample after 75,000 years.
2)
[tex]1.5 \times 10^{3} \; \text{g}[/tex]
There are [tex]160/30 = 16/3 \approx 5.3[/tex] half lives in 160 years.
[tex]\text{mass remaining in 160 years} / \text{initial mass} = (1/2)^{160/30} \approx 2.5 \times 10^{-2}[/tex]
Thus
[tex]\text{initial mass} = 37 \; \text{g} / (2.5 \times 10^{-2})= {\text{initial mass} } \approx 1.5 \times 10^{3} \; \text{g}[/tex]
PLSSS HELP
How do anion formation and valence electrons relate?
A) Atoms gain valence electrons to form anions.
B) Atoms yield valence electrons to form anions.
C) Atoms donate valence electrons to form anions.
D) Atoms relinquish valence electrons to form anions.
Vanadium has two naturally occuring isotopes - vanadium-50 and vanadium-51. Predict the isotopic mass of vanadium-50 given that vanadium-50 has an abundance of 0.250% and that vanadium-51 has an abundance of 99.750% and a mass of 50.944 amu.
A) 49.944 amu
B) 62.558 amu
C) 63.303 amu
D) 5094.151 amu
Scientists use the emission spectra of elements to detect
A) explosives in luggage.
B) cracks in support structures, like bridges.
C) the possibility of an earthquake occurrence.
D) elements in clouds of gas and dust in deep space
Stars, such as our sun, use fusion to combine hydrogen atoms into helium atoms, and in the process, create energy. As massive stars use the last of their helium fuel, they begin to collapse and temperatures climb high enough to fuse other heavier elements. As elements increase in atomic number, the amount of energy required for fusion to occur also increases. Nickel represents the heaviest element that can be produced by fusion due to to the net energy requirements. Two atoms of ___________ could combine by fusion in order to create nickel.
A) hydrogen
B) nitrogen
C) oxygen
D) silicon
Answer:
1. A) Atoms gain valence electrons to form anions.
2. D) 50.94151 amu
3. D) elements in clouds of gas and dust in deep space.
4. D) silicon
Explanation:
Hello,
1. In this question, we consider that anions are chemical ions negatively charged, it means that they gain valence electrons to increase their oxidation states, thus the answer is: A) Atoms gain valence electrons to form anions.
2. In order to compute the required average atomic mass, we must consider the mass of each isotope and its percentage as shown below:
[tex]M=50amu*0.0025+50.944amu*0.9975\\M=50.94151amu[/tex]
Therefore answer is D).
3. In this case, the answer is: D) elements in clouds of gas and dust in deep space, as each element has its own atomic emission spectrum, therefore one can identify the spectra in order to determine which elements are present.
4. Since helium is obtained via the atomic fusion of two hydrogen atoms, nickel can be obtained via the atomic fusion of two silicon atoms since each silicon has 14 protons and electrons, thus, if we fusion them we obtain 28 protons and electrons, validating the existence of a nickel atom.
Best regards.
Name the type of crystalline solid formed from the following structural units and describe how the solid is formed.
i. Metal atoms
ii. Nonmetal atoms
Answer:
Metal: iron, silver, or gold. Made with metallic bonds. Is a Metallic solid.
Nonmetal: diamond. Made with covalent bonds. Is a Network Solid.
Metallic solids are formed by metal atoms through metallic bonding. Nonmetallic solids can be classified as ionic, covalent network, or molecular depending on the type of bond between nonmetal atoms.
Explanation:There are two main types of crystalline solids formed from different structural units.
i. Metal atoms: Metallic solids are formed by metal atoms, which are held together by metallic bonding. The structure of metallic crystals is often described as a uniform distribution of atomic nuclei within a 'sea' of delocalized electrons. Examples of metallic solids include crystals of copper, aluminum, and iron.
ii. Nonmetal atoms: Nonmetallic solids can be classified into different types, such as ionic solids, covalent network solids, and molecular solids. The specific way in which nonmetal atoms form a crystalline solid depends on the type of bond between the atoms. For example, in ionic solids, nonmetal atoms are held together by ionic bonds, while in covalent network solids, nonmetal atoms are linked by covalent bonds.
What is the pH of 0.10 M NaF(aq). The Ka of HF is 6.8 x 10-4
2.08
8.08
5.92
14.92
Given information:
Concentration of NaF = 0.10 M
Ka of HF = 6.8*10⁻⁴
To determine:
pH of 0.1 M NaF
Explanation:
NaF (aq) ↔ Na+ (aq) + F-(aq)
[Na+] = [F-] = 0.10 M
F- will then react with water in the solution as follows:
F- + H2O ↔ HF + OH-
Kb = [OH-][HF]/[F-]
Kw/Ka = [OH-][HF]/[F-]
At equilibrium: [OH-]=[HF] = x and [F-] = 0.1 - x
10⁻¹⁴/6.8*10⁻⁴ = x²/0.1-x
x = [OH-] = 1.21*10⁻⁶ M
pOH = -log[OH-] = -log[1.21*10⁻⁶] = 5.92
pH = 14 - pOH = 14-5.92 = 8.08
Ans: (b)
pH of 0.10 M NaF is 8.08
Consider the equilibrium: HCOOH(aq) + F-(aq) <----> HCOO-(aq) + HF (aq) Given that the Ka of HCOOH = 1.8 x 10-4 and the Ka of HF = 6.8 x 10-4, calculate the equilibrium constant and predict whether the equilibrium favors reactants or products.
0.265; reactants
3.8 x 10-8; reactants
3.0 x 10-9; reactants
3.8; products
Hey there!:
K = Ka * Kb / Kw
Ka = 1.8*10⁻⁴
Kb = 10⁻¹⁴ / 6.8*10⁻⁴
K = 1.8*10⁻⁴ * ( 10⁻¹⁴/ 6.8*10⁻⁴ ) * ( 1 / 10⁻¹⁴ )
K = = 1.8 / 6.8
K = 0.265
Answer A
Therefore:
K is less than on the forward reaction is not favorable .
Hope That helps!
Which of the following is the science of naming living things according to common characteristics? A) taxonomy Eliminate B) classification C) phylogeny D) taxon
Answer: A) Taxonomy
Taxonomy is the science of naming groups of living organism based on common characteristics
The answer is A.
Taxonomy is the science of naming living things according to common characteristics.It is also the science of grouping organisms according to their characteristics and evolutionary history.