Answer:
The correct option is;
S is more nucleophiclic than O because S is larger than O therefore S is less well solvated than O
Explanation:
Here we have
As the size of atoms increases, the basicity increases and the nucleophilicity increases. Therefore since S is larger than O it is more nucleophilic than O.
Also we have smaller nucleophiles are more solvated than larger nucleophiles therefore S is less well solvated than O.
Which gives the correct answer as;
S is more nucleophiclic than O because S is larger than O therefore S is less well solvated than O.
A nucleophile is a molecule or ion that donates an electron pair to form a new covalent bond, while an electrophile accepts an electron pair to form a new covalent bond.
Explanation:A nucleophile is a molecule or ion that donates an electron pair to form a new covalent bond. An electrophile is a molecule or ion that accepts an electron pair to form a new covalent bond. Nucleophiles are typically more nucleophilic than electrophiles due to the presence of a lone pair of electrons. The nucleophilicity of a nucleophile can be influenced by factors such as electronegativity and steric hindrance.
For example, in a reaction between a nucleophile and an electrophile, the nucleophile attacks the electrophilic center, forming a new bond and displacing a leaving group. The nucleophile is usually a lone pair donor, such as an anion or a molecule with a lone pair of electrons, while the electrophile is typically an atom or molecule with a partially positive charge.
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!!!!!!!!!! When atoms in covalent bond share electrons equally, the bond is said to be blank
Answer:
The bond is considered to be nonpolar.Explanation:
A nonpolar covalent bond is created when atoms share their electrons equally.
Polar covalent bond is created when atoms share their electrons unequally.
Solubility
Which of the following are nonelectrolytes? *
Pentacarbon decahydride (C5H10)
O
Magnesium chloride (MgCl2)
O
Copper phosphate (Cu3(PO4)2]
Sulfur trioxide (SO3)
O
0
Aluminum oxide (A1203)
Phosphorus pentachloride (PC15)
Glucose (C6H1206)
Non electrolytes are Pentacarbon decahydride, Phosphorus pentachloride, Glucose.
Explanation:
Non electrolytes do not exist as ions in aqueous solution. Since it does not get dissociated into ions, these non electrolytes do not conduct electricity when it is dissolved or it is heated or melted.
Pentacarbon decahydride is a non electrolyte.
Magnesium chloride is an electrolyte.
Copper phosphate is an electrolyte
Sulfur trioxide is an electrolyte.
Aluminum oxide is an electrolyte
Phosphorus pentachloride do not get dissociated into its ions so it is a non-electrolyte.
Glucose gets dissolved in water but do not dissociate into ions, so it is a non electrolyte.
5.943x10^24 molecules of H3PO4 will need how many grams of Mg(OH)2 in the reaction below? 3 Mg(OH)2 + 2 H3PO4 -------> 1 Mg3(PO4)2 + 6 H2O
Answer:
Mass of Mg(OH)₂ required for the reaction = 863.13 g
Explanation:
3Mg(OH)₂ + 2H₃PO₄ -------> Mg₃(PO₄)₂ + 6H₂O
(5.943 x 10²⁴) molecules of H₃PO₄ is available fore reaction. Mass of Mg(OH)₂ required for reaction.
According to Avogadro's theory, 1 mole of all substances contain (6.022 × 10²³) molecules.
This can allow us find the number of moles that (5.943 x 10²⁴) molecules of H₃PO₄ represents.
1 mole = (6.022 × 10²³) molecules.
x mole = (5.943 x 10²⁴) molecules
x = (5.943 x 10²⁴) ÷ (6.022 × 10²³)
x = 9.87 moles
From the stoichiometric balance of the reaction,
2 moles of H₃PO₄ reacts with 3 moles of Mg(OH)₂
9.87 moles of H₃PO₄ will react with y moles of Mg(OH)₂
y = (3×9.87)/2 = 14.80 moles
So, 14.8 moles of Mg(OH)₂ is required for this reaction. We them convert this to mass
Mass = (number of moles) × Molar mass
Molar mass of Mg(OH)₂ = 58.3197 g/mol
Mass of Mg(OH)₂ required for the reaction
= 14.8 × 58.3197 = 863.13 g
Hope this Helps!!!
Answer:
5.943 × 10²⁴ molecules of H₃PO₄ will react with 789.29 grams of Mg(OH)₂
Explanation:
Here we have
5.943 × 10²⁴ molecules of H₃PO₄ in a reaction with Mg(OH)₂
as follows
3Mg(OH)₂ + 2H₃PO₄ → Mg₃(PO₄)₂ + 6H₂O
Therefore 3 moles of Mg(OH)₂ react with 2 moles of H₃PO₄ to form 1 mole of Mg₃(PO₄)₂ and 6 moles of H₂O
5.943 × 10²⁴ molecules of H₃PO₄ which is equivalent to [tex]\frac{5.943 \times 10^{24}}{6.02 \times 10^{23}} moles = 9.869 \, moles \, of \, H_3PO_4[/tex]
Will react with 3/2×9.869 moles or 14.8 moles of Mg(OH)₂
One mole of Mg(OH)₂ weighs 58.3197 g/mol
Therefore, 5.943 × 10²⁴ molecules of H₃PO₄ will react with 14.8×58.3197 g or 789.29 grams of Mg(OH)₂.
"Acetylcholinesterase follows Michaelis-Menten kinetics. A 1.3 micromolar solution of acetylcholinesterase catalyzes the formation of 6.5 mmoles choline s-1 when saturated with acetylcholine. What is acetylcholinesterase's kcat?"
Answer:5000 s^-1
Explanation: Solution=
Using the formulae----> Kcat=Vmax/Et
where
Vmax is the maximum rate of the reaction when all the enzymes are saturated.
Vmax= 6.5 mmoles/s
Et=1.3 uM
1 mmole= 1000 umole
Changing to micromoles/sec, gives=
Vmax= 6.5 mmoles/s \times 1000= 6500 micromoles/s
Bringng back the equation,
----->Kcat= Vmax/Et
= 6500/1.3
= 5000 /s
Therefore, our answer is 5000 s^-1
A 4.0 g sample of iron was heated from 0°C to 20.°C. It absorbed 35.2 J of energy as heat. What is the specific heat of this piece of iron?
Answer:
Explanation:i joule is equal to 0.238902957619 calories so 1251 joules is equal to 298.87 calories divided by 25.0 degrees centigrade is equal to 11.95 calories divided by the 35.2 gram sample weight to get the calories per gram per degree centigrade would come to 0.3396 calories/gram degree centigrade. Presumably this, if correct, could be used to obtain the metal in question by consulting a chart or table with specific heats of various metals because they should always be the same specific heat for each metal.
Sarah lives beside the ocean in Eureka, California. Her penpal, Ruby, lives in Redding, California, which is located inland. As a school project one year, Sarah and Ruby decide to collect local climate data and compare the average monthly high and low temperatures from their cities. The data they collect are shown below. Month Eureka Average High Eureka Average Low Redding Average High Redding Average Low January 54°F 41°F 55°F 35°F February 55°F 43°F 58°F 38°F March 55°F 43°F 70°F 41°F April 56°F 45°F 71°F 45°F May 58°F 48°F 80°F 52°F June 60°F 51°F 89°F 60°F July 61°F 52°F 98°F 64°F August 62°F 53°F 97°F 61°F September 63°F 51°F 89°F 56°F October 61°F 49°F 69°F 45°F November 58°F 45°F 60°F 40°F December 55°F 42°F 55°F 34°F Based on the climate data that Sarah and Ruby collect, they can conclude that
Answer:
Temperature variance at Redding > > Temperature variance beside at Eureka
Monthly temperatures at Redding are generally higher than the monthly temperatures beside the ocean at Eureka
Explanation:
Month January
Eureka Eureka Redding Redding
Average Average Average Average
High Low High Low
54°F 41°F 55°F 35°F
February
55°F 43°F 58°F 38°F
March
55°F 43°F 70°F 41°F
April
56°F 45°F 71°F 45°F
May
58°F 48°F 80°F 52°F
June
60°F 51°F 89°F 60°F
July
61°F 52°F 98°F 64°F
August
62°F 53°F 97°F 61°F
September
63°F 51°F 89°F 56°F
October
61°F 49°F 69°F 45°F
November
58°F 45°F 60°F 40°F
December
55°F 42°F 55°F 34°F
58 46.92 74.25 47.58 Mean
3.16 4.25 15.99 10.63 Standard Dev
9.97 14.08 255.84 112.992 Variance
63 53 98 64 Max
54 41 55 34 Min
Based on the climate data that Sarah and Ruby collect, they can conclude that
From the data we have
From the data it is observed that the temperatures beside the ocean in Eureka are lesser than and more stable (vary less) than the temperatures in Redding, also the temperatures in Redding are much higher than the temperatures beside the ocean in Eureka.
Elements in group 7A in the periodic table are called the halogens: elements in group 6A are called the chalcogens (a)
What is the most common oxidation state of the chalcogens compared to the halogens? (b) For each of the following
periodic properties. state whether the halogens or the chalcogens have larger values: atomic radii, ionic radii of the most
common oxidation state, first ionization energy. second ionization energy.
Answer:
Most common oxidation state of the chalcogens is -2, most common oxidation state of the halogens is -1.
Explanation:
For atomic radii, the chalcogens have a larger atomic radii than the halogens
This is because atomic radii decreases across the period due to increase in nuclear charge.
For ionic radii the chalcogens also have larger ionic radii than the halogens. This is because the chalcogens always carry a -2 charge compared to halogens that carry a -1 charge. Since -2 is the most common oxidation state for chalcogens and -1 is the most common oxidation state for the halogens.
In terms of oxidation states, the halogens show a higher value of common oxidation state -1 while for chalcogens is -2 even though +2, +4 and +6 oxidation states are also well known.
First ionization energy of halogens is greater than that of the chalcogens due to greater effective nuclear charge.
The second ionization energy of chalcogens is greater than that of the halogens.
Chalcogens have −2, +2, +4, and +6 whereas halogens have −1, +1, +3, +5, and +7 oxidation state.
The most common oxidation states of the elements of chalcogens are −2, +2, +4, and +6 while on the other hand, the oxidation states of halogens such as fluorine, chlorine, bromine, and iodine are −1, +1, +3, +5, and +7. The chalcogens have larger atomic as well as ionic radii as compared to halogens because of the presence of less number of electrons in the outermost shell.
We know that when we moves from left to right in the periodic table, atomic radius decreases due to addition of extra electrons in the outermost shell. The attraction of nucleus on the additional electron increases which leads to movement of outermost shell nearer to nucleus.
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why can a magnet separate iron and sulphur in a mixture but not a compound?
Answer:
A compound is different from elements in that it is made from the chemical union of two or more elements. ... Mixtures are different from compounds in that they are easily separated. A magnet could be used to separate the iron from the sulfur, because iron is attracted to magnets, while sulfur is not.
Explanation:
Zinc granules on treating with an acid X, form the zinc sulphate (ZnSO4) salt along with the evolution of a gas Y which burns with a pop sound when brought near to a burning candle.
Answer:
Question is incomplete, the complete question is;
Zinc granules on treating with an acid X, form the zinc sulphate (ZnSO4) salt along with the evolution of a gas Y which burns with a pop sound when brought near to a burning candle. Identify the acid X and gas evolved Y.
Answer is;
Acid X is sulfuric acid (H₂SO₄) and the gas evolved Y is hydrogen (H₂).
Explanation:
Acids react with metals to produce a salt and hydrogen. The metal ions replace the hydrogen ions in the acids.
When Zinc (Zn) granules are treated with sulfuric acid (H₂SO₄), the products are zinc sulfate (ZnSO₄) and hydrogen (H₂).
H₂SO₄ + Zn → ZnSO₄ + H₂
This reaction is a redox reaction, where reduction and oxidation happen at the same time. Zinc atoms are oxidized since they lose electrons (Zn → Zn²⁺ + 2e⁻), and hydrogen ions are reduced since they gain electrons (2H⁺ + 2e⁻ → H₂).
Hydrogen is a highly flammable gas, which reacts with oxygen molecules to produce water, combined with an explosive release of energy. But a source of energy like a small spark is needed for this reaction to take place since hydrogen does not react with oxygen at room temperature.
The activation energy (energy required for a reaction to proceed) of hydrogen is low, so only a small amount of energy is needed to trigger a reaction with oxygen. When hydrogen is brought near to a burning candle, it reacts with oxygen in the air in a small explosion by producing a squeaky pop sound.
In the question, Zinc granules are treated with an acid X to form zinc sulfate (ZnSO₄) salt along with the evolution of a gas Y which burns with a pop sound when brought near to a burning candle. So, now it is clear that the acid X is sulfuric acid (H₂SO₄) and the gas evolved Y is hydrogen (H₂).
Individuals who work full time and those who work part-time enjoy basically the same number of paid leave benefits.
True
False
Whenever quantities of two or more reactants are given in a stoichiometric problem, you must identify the __________. This is the reagent that is completely up in the reaction.
The amount of limiting reagent determines the amount of __________ that is formed. When an equation is used to calculate the amount of product that will form during a reaction, the value obtained is the __________. This is the amount of product that could be formed from a given amount of__________. The amount of product that forms when the reaction is carried out in the laboratory is called the __________.
Answer:
1. Limiting reactant.
2. Product.
3. Theoretical yield.
4. Reactants.
5. Actual yield
Explanation:
1. The limiting reactant. The limiting reactant is the reagent that is completely up in the reaction.
2. Product. Product is the result obtained From a reaction and the amount of product formed is determined by the limiting reactant
3. Theoretical yield. This is the result obtained from the stoichiometry calculations.
4. Reactant. Reactant are the starting material for a chemical reaction. The amount of the reactants determines the theoretical yield (products)
5. Actual yield. This is the result obtained from the experiment carried out in the laboratory.
How many tiny frogs sitting next to each other would measure the same length as a Blue Whale?
Answer:
About 2,500
Explanation:
The blue whale is the largest animal on Earth. The length of a blue whale is about 25 m, although is is said the largest confirmed measure is 29.9m.
The tiny frogs measure about 10mm.
You can estimate the number of tiny frogs that have the same length as a blue whale dividing the approximate average length of a blue whale by the approximate average length of the tiny frogs.
First convert 25m to mm:
25m × 1,000mm/m = 25,000 mmNow, divide:
25,000mm / 10mm = 2,500Hence, about 2,500 tiny frogs sitting next to each other would measure the same length as a blue whale.
Answer:
LOOK BELOW
Explanation:
Well a female is 82ft and a male is 79ft so we will just go with both answers. A tiny frog is about a estimate length of 0.27 inches so you would have to divide and or multiply 82 by 0.27 getting your first length then do the same with teh next one and thats you answer! hope i helped bby :3
threats faced by the Everglades and the Louisiana wetlands.
Answer:
Invasive species, runoff pollution, and climate change.
Explanation:
Invasive species, such as Burmese pythons, threaten the Florida Everglades because they are not native to the natural habitat. Pythons eat the native animals, but they don't have any predators.
Pollution from nearby farms and roads enters the water and damages the ecosystem of the Everglades and Louisiana wetlands. Toxic chemicals lead to detrimental effects for both humans and wildlife.
Humans have drained swampy areas to allow for development. However, this has led to the Everglades drying up and even burning in recent years.
Marcie is hiking in the mountains and she discovers an interesting shiny rock.As she picks it up she wonders whether it could be a mineral or whether it's just a rock. She notes that it is solid and naturally occurring with a definite chemical composition, but that it has no definite crystal structure
Given its lack of a definite crystal structure, Marcie's shiny rock is likely a rock, not a mineral. Rocks are comprised of various minerals and other materials, which results in a less distinct structure compared to minerals.
Explanation:Marcie's shiny rock is likely a rock, given its description. Rocks and minerals, while sharing some characteristics, have key differences. Both rocks and minerals are solid, naturally occurring substances. However, minerals, besides having a definite chemical composition, also possess a specific crystal structure. By confirming that Marcie's shiny rock does not have a definite crystal structure, it's safer to categorize it as a rock. Rocks are comprised of different minerals as well as other elements, making them less uniform than minerals. Rocks range from three basic types: igneous (from molten rock or lava), sedimentary (from the deposition and sedimentation of organic or inorganic particles), and metamorphic rock (undergone chemical alteration under high temperature and pressure).
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Marcie's rock is likely a rock, not a mineral, due to its lack of a definite crystalline structure. Although certain rocks with metallic content can be extraterrestrial, no indication is given to suggest this. The rock could be classified as metamorphic, sedimentary, or igneous, depending on its formation process.
Explanation:Marcie's shiny rock, being solid, naturally occurring, and possessing a definite chemical composition, meets most criteria to be termed a mineral. However, a key aspect of a mineral is that it exhibits a definite crystalline structure, which her rock does not. Hence, it would better be described as a rock. Rocks can be an amalgamation of different minerals and do not require a specific crystalline structure to classify.
The identified characteristics of the rock, however, do not necessarily mean it is extraterrestrial in origin, as the provided references might suggest. While it is true that the irons and stony-irons with metallic content can be extraterrestrial, there is no indication given that Marcie's rock is metallic or contains iron. Therefore, it is unlikely a meteorite. It may require a laboratory analysis to confirm this.
It may be a metamorphic, sedimentary, or igneous rock, which are categories based on their geologic formation processes. Metamorphic rocks undergo physical and chemical alteration under high temperature and pressure, sedimentary rocks are formed from the sedimentation of particles, and igneous rocks originate from the solidification of magma or lava.
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It is easier for a large corporation to offer benefits to its employees than for a smaller company.
True
False
Answer:
true
Explanation:
Answer: True
Explanation: Because the large company has more people and is making more money than the smaller company
A sample of hydrogen gas, H2(g), is placed in a 0.500 L container at 295 K. The gas pressure is
1.442 bar.
The question relates to the ideal gas law in chemistry, which connects the pressure, volume, temperature, and number of moles of hydrogen gas in a given scenario.
Explanation:The student's question involves a sample of hydrogen gas (H2), which is placed in a 0.500 L container at a temperature of 295 K with a pressure of 1.442 bar. This scenario typically deals with concepts such as gas laws and molar calculations from chemistry, specifically the ideal gas law, which relates the pressure, volume, temperature, and number of moles of a gas.
To solve problems like this, one would normally use the ideal gas law equation: PV = nRT. However, without the number of moles or the specific R constant provided, one cannot calculate the moles directly. Additional information or a different question that involves changing conditions where the ideal gas law can be applied might be necessary.
The three main types of scientific investigations are descriptive, comparative, and experimental. Which components are
included in all three types of investigations?
a scientific question
an independent variable
a dependent variable
a procedure
a control group
a conclusion
What’s the connection between population and limiting factors?
Answer:
Limiting factors are resources or other factors in the environment that can lower the population growth rate. Limiting factors include a low food supply and lack of space. Limiting factors can lower birth rates, increase death rates, or lead to emigration.
Explanation:
Which of the following are not at equilibrium? Check all that apply. Check all that apply. The concentrations of reactants and the products are not constant. The rate of the forward reaction does not change. The rates of the forward and reverse reactions are equal.
The concentrations of reactants and the products are not constant and the rates of the forward and reverse reactions are equal. and these reactions are not at equilibrium.
Explanation:
The conditions to attain equilibrium is that,
Conversion of reactant to product and vice versa occurs at the same rate.The system is a closed system.The temperature remains constant.Concentration of every substance remains constant.Rate of forward and reverse reactions will be different.So the answer is The concentrations of reactants and the products are not constant and the rates of the forward and reverse reactions are equal.
A system is at equilibrium when the rates of forward and reverse reactions are equal and the concentrations of reactants and products are constant. Thus, any changes in concentrations or reaction rates indicate that the system is not at equilibrium.
Explanation:Based on Chemical Equilibrium principles, a system is at equilibrium when the rates of the forward and reverse reactions are equal, and the concentrations of reactants and products are constant. Therefore, if the concentrations of the reactants and the products are not constant, the system is not at equilibrium. Similarly, if there is a condition where the rate of the forward or reverse reaction does not change, the system is also not at equilibrium.
This means that even if the forward and reverse reaction rates are equal, but the concentrations are still fluctuating, the system hasn't reached equilibrium yet. So changes in the concentrations of the reactants or products indicate that the system is not in equilibrium. These principles form the basis of the Le Châtelier's principle.
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How many calories are needed to raise the temperature of 25 grams of water form 50°C to 70°C? The specific heat of water is 1cal/g°C
Answer:
500 calories
Explanation:
Heat gained or lost is mass times specific heat times change in temperature. Using this formula, the answer is 500 calories.
85.0 grams of NaN3 decompose at 75 degrees Cesius and at 2.3atm. Of pressure. What volume of N2 will be made according to the equation: 2NaN3(g) -------> 2Na(g) + 3N2(g)
Ideal gas law is valid only for ideal gas not for vanderwaal gas. Therefore the volume of N[tex]_2[/tex] will be made according to the equation is 2.64l.
What is ideal gas equation?Ideal gas equation is the mathematical expression that relates pressure volume and temperature. Ideal gas is a hypothetical gas. Vanderwaal gas can behave as ideal gas at low pressure and high temperature.
Mathematically,
PV=nRT
where,
P = pressure= 2.3atm
V= volume=?
n =number of moles=85.0/65.01
=1.30moles
T =temperature=348K
R = Gas constant = 0.0821 L.atm/K.mol
Substituting all the given values in the above equation, we get
2.3 × V=1.30× 0.0821 L.atm/K.mol × 348 K
V=1.76l
volume of nitrogen = 3/2× 1.76l=2.64l
Therefore the volume of N[tex]_2[/tex] will be made according to the equation is 2.64l.
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To calculate the volume of nitrogen gas produced from the decomposition of NaN3 at a given temperature and pressure, we must apply the stoichiometry from the balanced chemical equation and use the ideal gas law formula.
Explanation:The student's question involves determining the volume of nitrogen gas (N2) produced from the decomposition of sodium azide (NaN3) under specified conditions of temperature (75 degrees Celsius) and pressure (2.3 atm). To solve this, one must use the ideal gas law, PV = nRT, where P is the pressure, V is the volume, n is the number of moles of gas, R is the ideal gas constant, and T is the temperature in Kelvin. The first step is to calculate the moles of N2 that can be produced from 85.0 grams of NaN3 using the stoichiometry of the given balanced equation.
Firstly, one needs to find the molar mass of NaN3 to convert grams to moles. Then, apply the stoichiometry from the balanced equation (2 mol NaN3 produces 3 mol N2). Finally, using the calculated number of moles of N2, apply the ideal gas law to find the volume of nitrogen gas at the given temperature and pressure.
How many moles are present in 4.7 liters of Argon gas at STP?
The answer for the following problems is mentioned below.
Therefore the number of moles present in Argon is 0.20 moles.Explanation:
Mole:
The mass of a substance containing the same number of fundamental units as there are atoms in exactly 12.000 g of [tex]C^{12}[/tex].
Given:
volume (v) = 4.7 litres
Volume of argon at STP conditions = 22.4 litres
To find:
volume of argon at STP conditions
We know;
n = [tex]\frac{v}{V}[/tex]
where;
n represents the no of moles
v represents the volume of the argon
V represents the volume of argon at STP
volume of the argon at STP conditions is 22.4 litres
So;
n = [tex]\frac{4.7}{22.4}[/tex]
n = 0.20 moles
Therefore the number of moles present in Argon is 0.20 moles.
There are 0.107 moles of Argon gas present in 4.7 liters at STP.
To determine the number of moles of Argon gas present in 4.7 liters at STP (Standard Temperature and Pressure), we can use the Ideal Gas Law, which is given by:
[tex]\[ PV = nRT \][/tex]
where:
- [tex]\( P \)[/tex] is the pressure,
- [tex]\( V \)[/tex] is the volume,
- [tex]\( n \)[/tex] is the number of moles,
- [tex]\( R \)[/tex] is the ideal gas constant, and
- [tex]\( T \)[/tex] is the temperature.
At STP, the conditions are defined as:
- [tex]\( P = 1 \)[/tex] atmosphere (atm),
- [tex]\( T = 273.15 \)[/tex] Kelvin (K).
The value of the ideal gas constant [tex]\( R \)[/tex] is approximately [tex]\( 0.0821 \frac{\text{L} \cdot \text{atm}}{\text{mol} \cdot \text{K}} \)[/tex].
We can rearrange the Ideal Gas Law to solve for n (the number of moles):
[tex]\[ n = \frac{PV}{RT} \][/tex]
Given that [tex]\( V = 4.7 \)[/tex] liters, we can plug in the values:
[tex]\[ n = \frac{(1 \text{ atm})(4.7 \text{ L})}{(0.0821 \frac{\text{L} \cdot \text{atm}}{\text{mol} \cdot \text{K}})(273.15 \text{ K})} \][/tex]
[tex]\[ n = \frac{4.7}{0.0821 \times 273.15} \][/tex]
[tex]\[ n = \frac{4.7}{22.41} \][/tex]
[tex]\[ n \approx 0.107 \text{ moles} \][/tex]
Therefore, there are approximately 0.107 moles of Argon gas in 4.7 liters at STP.
Dalton's law states that
A) gas volume and temperature are directly proportional.
B) gas pressure is inversely proportional to gas volume.
C) in a mixture of gases such as air, the total pressure is the sum of the individual partial pressures of the gases in the mixture.
D) gas volume and pressure are inversely proportional.
E) the volume of gas that will dissolve in a solvent is proportional to the solubility of the gas and the gas pressure.
Answer:
C) in a mixture of gases suck as air, the total pressure is the sum of the individual partial pressure of the gasses in the mixture
Dalton's law, or the law of partial pressures, states that in a mixture of gases, the total pressure is the sum of the individual partial pressures of the gases in the mixture.
Explanation:The correct answer to the question regarding Dalton's law is that, C) in a mixture of gases such as air, the total pressure is the sum of the individual partial pressures of the gases in the mixture. This is because Dalton's law, also referred to as Dalton's law of partial pressures, states that the total pressure exerted by a mixture of gases is the sum of the partial pressures of each individual gas in the mixture.
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What is the definition of Amplitude?
Answer:
the maximum extent of a vibration or oscillation, measured from the position of equilibrium.
Explanation:physics
Amplitude, within a Physics context, describes the maximum displacement from an equilibrium or rest position. It is especially important in the study of waves and sound, affecting the height of waves and the perceived volume of sound respectively.
Explanation:The term Amplitude in physics refers to the maximum displacement from the equilibrium or rest position. Precisely, it can be defined as the distance from the equilibrium position of the medium to a compression or a rarefaction. For example, in the context of waves, the amplitude is the measurement of the wave's height from the equilibrium position (mid-point or rest point of the wave) to its crest (highest point).
When applied to sound, amplitude refers to the magnitude of compression and expansion in sound waves. Sound with higher amplitudes are perceived as louder, measured in decibels (dB), due to their greater displacement from the point of equilibrium.
The units for measuring amplitude can vary according to the context and can be centimeters, meters, or any other convenient unit of distance. As the Amplitude increases, the intensity or loudness of the wave also increases correspondingly. Therefore, amplitude plays an essential role in determining the characteristics and impact of the wave.
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How do power plants use nuclear fission to generate electricity?
A. Fission creates new elements from which electricity can be generated.
B. Fission releases energy in the form of electricity.
C. Fission breaks down radioactive materials into electrically charged materials.
D. Fission produces heat, which is used to produce steam to power generators.
which two conditions must exist in population for natural selection to take place ?
Final answer:
Natural selection requires genetic variation within a population and environmental pressures that select for certain traits, leading to changes in the population's genetic makeup over generations.
Explanation:
For natural selection to take place in a population, two essential conditions must exist: genetic variation among individuals and environmental pressures that favor certain traits over others. Genetic variation ensures that there are differences in traits among individuals, which may be advantageous or not depending on the environmental context. These traits must have a genetic basis so that they can be inherited by the next generation.
Environmental pressures, such as climate change, predation, availability of resources, and competition, then determine which of these traits are beneficial, leading to the greater reproductive success of individuals with those traits, thus altering the genetic makeup of the population over time.
"You measure 48.9 mL of a solution of sulfuric acid with an unknown concentration, and carefully titrate this solution using a 1.500 M solution of KOH. You find that 34.7 mL of the KOH solution is required to fully neutralize the acid. What is the concentration of the original sulfuric acid solution
Answer:
C= 0.532M
Explanation:
The equation of reaction is
H2SO4 + 2KOH = K2SO4+ H2O
nA= 1, nB= 2, CA= ?, VA= 48.9ml, CB= 1.5M, VB= 34.7ml
Applying
CAVA/CBVB = nA/nB
(CA× 48.9)/(1.5×34.7)= 1/2
Simplify
CA= 0.532M
What is the purpose of a salt bridge in a voltaic cell consisting of separate breakers? Why is a salt bridge unnecessary in a single-breaker voltaic cell in which the compartments are separated by a porous divider?
Answer:
1. The salt bridge completes the circuit of the voltaic cell to allow the flow of current
2. The porous divider performs the function of a salt bridge, hence a salt bridge is unnecessary in a single-beaker voltaic cell
Explanation:
1. The oxidation and reduction half cells of a voltaic cell are connected by the salt bridge in other to ensure that the internal circuit is electrically neutral, to avoid the rapid reaction to reach equilibrium conditions which affects results in preventing voltage drop in the voltaic cell.
The salt bridge also aids in charge accumulation
2. In a single-beaker voltaic cell with the compartments separated by a porous divider, the function of the porous divider is the same as that of the salt bridge, hence the salt bridge is unnecessary.
Answer:
Explanation:
A salt bridge is a strong electrolytes and it's ion like KNO3,Consider a voltaic cell with two paths the anode half cell and the cathode half cell,it will be observed that when the cell is connected,electrons leaves through the wire from the anode which is subject to oxidation hence producing both electrons and positive ions in the anode,if more of the electrons leaves the anode,need arises to to ensure electrochemical neutrality in the cell,this is we're the salt bridge is much important because it provides the needed negative ions to counter balance the effect of this,also a reversed process occurs in the second half Cathodoc cell.
Also for a simply voltaic cell separated by a porous membrane the salt bridge is not needed because unlike the half cell connected by a salt bridge the porous membrane servea as a media of exchange of ions for the cells.
The characteristic odor of pineapple is due to ethyl butyrate, an organic compound which contains only carbon, hydrogen and oxygen. If a sample of ethyl butyrate is known to contain 0.62069 g of carbon, 0.103448 g of hydrogen and 0.275862 g of oxygen, what is the empirical formula for ethyl butyrate?
Answer:
C3H6O
Explanation:
Data obtained from the question. This includes:
Carbon (C) = 0.62069 g
Hydrogen (H) = 0.103448 g
Oxygen (O) = 0.275862 g
The empirical formula can be obtained as follow:
Step 1:
Divide by their molar mass.
C = 0.62069 / 12 = 0.0517
H = 0.103448 / 1 = 0.103448
O = 0.275862 / 16 = 0.0172
Step 2:
Divide by the smallest number.
C = 0.0517 / 0.0172 = 3
H = 0.103448 / 0.0172 = 6
O = 0.0172 / 0.0172 = 1
Step 3:
Writing the empirical formula.
The empirical formula is C3H6O
Answer:
The empirical formula is C3H6O
Explanation:
Step 1: Data given
A sample of ethyl butyrate contains:
0.62069 g of carbon
0.103448 g of hydrogen
0.275862 g of oxygen
Atomic mass of carbon = 12.01 g/mol
Atomic mass of hydrogen = 1.01 g/mol
Atomic mass of oxygen = 16.0 g/mol
Step 2: Calculate moles
Moles = mass / molar mass
Moles carbon = 0.62069 grams / 12.01 g/mol
Moles carbon = 0.0517 moles
Moles hydrogen = 0.103448 grams / 1.01 g/mol
Moles hydrogen = 0.1024 moles
Moles oxygen = 0.275862 grams / 16.0 g/mol
Moles oxygen = 0.0172 moles
Step 3: Calculate the mol ratio
We divide by the smalllest amount of moles
C: 0.0517 moles / 0.0172 moles = 3
H: 0.1024 moles / 0.0172 moles = 6
O: 0.0172 moles / 0.0172 moles = 1
The empirical formula is C3H6O
A 2.50 g sample of zinc is heated, and then placed in a calorimeter containing 65.0 g of water. Temperature of water increases from 20.00 oC to 22.50 oC. The specific heat of zinc is 0.390 J/g oC. Assuming no heat loss, what was the initial temperature of the zinc metal sample?
The initial temperature of the zinc metal is 720 ° C
Explanation:
Given data,
Zn
m=2.50 g
C=0.390 J/g° C
ΔT= (22.50° C- Ti)
H2O
m= 65.0 g
C= 4.184 J/ g° C
ΔT = 2.50° C
We have the formula,
qH20= - qZn
(65.0 g) (4.184 J/ g° C) (ΔT 2.50° C)=(2.50 g) ( 0.390 J/g° C) (ΔT 22.50° C- Ti)
solving the equation we get,
697.3 ° C=- 22.50 ° C+Ti
Ti= 720 ° C
The initial temperature of the zinc metal is 720 ° C