Answer:
Forming acids and alkalis. Soluble metal oxides (or metal hydroxides) produce alkaline solutions. Soluble non-metal oxides produce acidic solutions. Insoluble oxides will not affect the pH of water.
Explanation:
While most metal oxides form basic solutions by reacting with water, this is not universal; some metal oxides, particularly those with higher oxidation states, can be amphoteric or acidic and do not produce alkaline solutions.
Explanation:Not all metal oxides produce alkaline solutions when reacted with water, as the reaction depends on the properties of both the metal and its oxide. Most metal oxides are base anhydrides and will react with water to produce basic solutions, especially if the oxides are soluble and thus form metal hydroxides. However, this does not apply to metal oxides across the board. Some metal oxides have low oxidation states and are amphoteric or primarily acidic, meaning they can behave as either acids or bases depending on the conditions. For instance, metal oxides at lower oxidation states tend to react with aqueous acids forming solutions of salts and water rather than acting as bases. Oxides of metals with high oxidation states (4+ or more) such as vanadium(V) oxide and chromium(VI) oxide are acidic and will react with solutions of hydroxides to form salts and water, rather than producing alkaline solutions.
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What type of reaction is:
Answer:
The answer to your question is Combustion
Explanation:
Chemical reaction
2C₄H₁₀ + 13 O₂ ⇒ 8 CO₂ + 10 H₂O
A combustion reaction is a chemical reaction in which the reactants are always a molecule with carbon (organic molecule) and oxygen (O₂), and the products are always carbon dioxide (CO₂) and water (H₂O).
Conclusion
The chemical reaction of this problem is combustion
Suppose the reaction Ca3(PO4)2 + 3H2SO4 --> 3CaSO4 + 2H3PO4 is carried out starting with
153 g of Ca3(PO4)2
and 76.8 g of H2SO4
How many grams of phosphoric acid will be produced.
Answer:
The answer to your question is 51.2 g of H₃PO₄
Explanation:
Data
mass of Ca₃(PO₄)₂ = 153 g
mass of H₂SO₄ = 76.8 g
mass of H₃PO₄ = ?
Balanced chemical reaction
Ca₃(PO₄)₂ + 3H₂SO₄ ⇒ 3CaSO₄ + 2H₃PO₄
Process
1.- Calculate the molar mass of the reactants
Ca₃(PO₄)₂ = (3 x 40) + (2 x 31) + (8 x 16) = 120 + 62 + 128 = 310 g
H₂SO₄ = (1 x 2) + (32 x 1) + (16 x 4) = 2 + 32 + 64 = 98 g
2.- Calculate the limiting reactant
Theoretical yield Ca₃(PO₄)₂ / H₂SO₄ = 310 / 3(98) = 1.05
Experimental yield Ca₃(PO₄)₂ / H₂SO₄ = 153 / 76.8 = 1.99
The limiting reactant is H₂SO₄ because the experimental proportion was higher than the theoretical proportion.
3.- Calculate the molar mass of H₃PO₄
H₃PO₄ = (1 x 3) + (31 x 1) + (16 x 4) = 3 + 31 + 64 = 98 g
4.- Calculate the mass of H₃PO₄
3(98) g of H₂SO₄ ------------------ 2(98) g of H₃PO₄
76.8 g of H₂SO₄ ------------------ x
x = (76.8 x 2 x 98) / (3 x 98)
x = 15052.8 / 294
x = 51.2 g of H₃PO₄
What is double substitution
Answer:
In Tcl the words in a command are always exposed to two layers of interpretation: First, Tcl interprets them and prepares them as arguments to a routine. Second, the routine interprets those arguments according to its own principles. double substitution occurs when Tcl performs substitutions on original command and a routine then performs substitutions on the resulting arguments. Care is required in these cases to avoid errors, including vulnerability to injection attacks.
Explanation:
this probably wont help but here
What amount of water is formed when 20 ml of 0.80 m hcl and 30 ml of 0.40 m naoh are mixed?
Answer: The amount of water formed is 12 moles
Explanation: Please see the attachments below
0.216 g of water is formed.
According to the question,
The concentration of HCl and NaOH are:
→ [tex]CHCl = \frac{20\times 0.80}{50}[/tex]
[tex]= 0.32 \ M[/tex]
→ [tex]CNaOH = \frac{30\times 0.40}{50}[/tex]
[tex]= 0.24 \ M[/tex]
Upon the reaction,
It will form 0.24 M of NaCl as well as 0.24 M of H₂O in 50 mL solution.
In 1000 mL,
→ [tex]1 M \ H_2O = 18 \g \ H_2O[/tex]
Now,
→ 50 mL of 0.24 M H₂O will contain:
= [tex](18\times 0.24)\times \frac{50}{1000}[/tex]
= [tex]0.216 \ g[/tex] (water)
Thus the response above is right.
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Which of the following organisms is a tertiary consumer
In the real world, a tertiary consumer can eat many different animals and even plants sometimes. This means that they can actually be carnivorous or omnivorous. Some examples of tertiary consumers include, birds of prey, big cats, and foxes.
The eastfork forest contains pine trees, birch trees, and dogwood trees. All the trees in this forest are considered a(n) _____
Answer:
The answer is community
I got it correct
Explanation:
Answer:
community is the answer
Explanation:
How many mL of 1.01 M LiNO3 solution has 6.63 g of solute?
Answer:
The answer to your question is 97 ml
Explanation:
Data
volume = ? ml
concentration = 1.01 M LiNO₃
mass = 6.63 g
Process
1.- Calculate the molecular weight of LiNO₃
LiNO₃ = (1 x 6.94) + (1 x 14) + (16 x 3)
= 6.94 + 14 + 48
= 69 g
2.- Calculate the moles of LiNO₃
69 g ------------------ 1 mol
6.63 g --------------- x
x = (6.63 x 1) / 69
x = 0.096 moles
3.- Calculate the volume
Molarity = moles / volume
-Solve for volume
Volume = Molarity x moles
-Substitution
Volume = 1.01 x 0.096
-Result
Volume = 0.097 l or 97 ml
The number of mL of of 1.01 M LiNO3 solution when solution has 6.63 g of solute should be 97 ml.
Calculation of the number of mL:Since
concentration = 1.01 M LiNO₃
mass = 6.63 g
First we have to determine the molecular weight of LiNO₃ i.e.
LiNO₃ = (1 x 6.94) + (1 x 14) + (16 x 3)
= 6.94 + 14 + 48
= 69 g
Now the moles of LiNO₃
69 g ------------------ 1 mol
6.63 g --------------- x
x = (6.63 x 1) / 69
x = 0.096 moles
Now the volume is
Molarity = moles / volume
It can be like
Volume = Molarity x moles
= 1.01 x 0.096
= 0.097 l or 97 ml
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how does coal convert to electrical energy?
Answer:
Coal-fired plants produce electricity by burning coal in a boiler to produce steam. The steam produced, under tremendous pressure, flows into a turbine, which spins a generator to create electricity. The steam is then cooled, condensed back into water and returned to the boiler to start the process over.
Explanation:
A chemistry student was asked to calculate the number of moles of iron required to react with 1.20 mol of oxygen to produce iron(III) oxide. His calculation is shown below: 1.20
Answer:
1.6 moles of iron
Explanation:
-Metals reacts with oxygen to form oxides.
-The chemical reaction between oxygen and iron is written as below:
[tex]4Fe_{(s)}+3O_2_{(g)}->2Fe_2O_3_{(s)}[/tex]
-pu notice from the balanced chemiocal equation above that the mole ration of iron to oxygen is 4:3
-We equate and cross multiply to find moles of iron in the reaction;
[tex]Fe:O_2=4:3\\\\\\\frac{Fe}{O_2}=\frac{4}{3}\\\\\frac{Fe}{1.2}=\frac{4}{3}\\\\Fe=\frac{4\times 1.2}{3}\\\\=1.6\ moles[/tex]
Hence, 1.6 moles of iron reacts with 1.2 moles of oxygen in the above reaction.
To calculate the number of moles of iron required to react with 1.20 mol of oxygen to produce iron(III) oxide, you need to determine the stoichiometric mole ratio from the balanced chemical equation. The ratio is 1 mole of iron to 1.5 moles of oxygen, which can be multiplied by 2 to get the balanced equation.
Explanation:To calculate the number of moles of iron required to react with 1.20 mol of oxygen to produce iron(III) oxide, you need to determine the stoichiometric mole ratio from the balanced chemical equation. Based on the equation, the ratio is 1 mole of iron to 1.5 moles of oxygen. Since the ratio is not a whole number, you need to multiply it by 2 to get the smallest possible whole number subscripts while maintaining the correct iron-to-oxygen ratio. Therefore, the balanced equation is: 2 Fe + 1.5 O₂ → Fe₂O₃.
Within a gas phase that is in contact with a liquid phase, molecules are moving randomly. These molecules are constantly entering into collisions with each other and with the liquid phase. The rate at which this occurs depends on the number of collisions which occur and this rate is _________________ to the partial pressure of the vapor.
Answer:
Directly Proportional
Explanation:
The partial pressure is defined as the pressure exerted by an individual gas that are present in a mixture as if it were alone in that particular system.
The kinetic molecular theory of gases is explained as the state of matter that is composed of tiny particles in constant motion even though there are distance between the colliding particles.They posses low density and Because of their nature gases can expansion and contraction of gas can be influenced under some condition.Unlike other fluid like liquids, the volume that gas usually occupied is empty space.
The gas particles are always in constant motion, and all the particles of the individual gases move and collide with one another and with the walls of the container they occupied. The magnitude of the gas pressure is been determined by the force with which they collide with one another.
Therefore,The rate at which collision occurs depends on the number of collisions which occur and this rate is directly proportional to the partial pressure of the vapor
Rank the following solutions from the highest [H3O+] (1) to the lowest [H3O+] (5).
[H3O+] = 3.16 × 10–4 M
[OH–] = 4.35 × 10–2 M
pH = 1.05
pOH = 7.0
pOH = 4.0
Answer:
1.) 2
2.) 5
3.)1
4.)3
5.)4
Explanation:
this in edge 2020
The solution ranked with the presence of hydronium ion concentration from higher to lower is pH = 1.05 > [OH⁻] = 4.35 * 10 ⁻² > [H₃O⁺] = 3.16 * 10⁻⁴ M > pOH = 7 > pOH = 4.
What is pH and pOH?The pH and pOH can be given as the logarithmic value of the presence of hydrogen or hydronium and hydroxide ion concentration in a solution respectively.
The hydronium ion concentration can be given as:
[H₃O⁺] = antilog (-pH)
The hydronium ion concentration of pH = 1.05 is:[H₃O⁺] = 10⁻¹.⁰⁵
[H₃O⁺] = 0.089 M
The pH from pOH can be calculated as:
pH = 14 - pOH
pH of solution with pOH 7 is:pH = 14 - 7
pH = 7
The hydronium ion concentration can be given as:
[H₃O⁺] = 10⁻⁷
[H₃O⁺] = 1 * 10⁻⁷ M
The pH of solution with pOH 4 isL:pH = 14 - 4
pH = 10
The hydronium ion concentration can be given as:
[H₃O⁺] = 10⁻¹⁰
[H₃O⁺] = 1 * 10⁻¹⁰ M
Thus, the solutions from highest to lowest hydronium ion concentration can be ranked as:
pH = 1.05 > [OH⁻] = 4.35 * 10 ⁻² > [H₃O⁺] = 3.16 * 10⁻⁴ M > pOH = 7 > pOH = 4.
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What is energy?
-The ability to do work or cause change
-Anything that has mass and takes up space
-Substances bonded together
-Both a and b
Answer:
Both a and b
Hope this answer helps you
Final answer:
Energy is the ability to do work or cause change and comes in many forms like mechanical, electrical, kinetic, and potential. It is a fundamental concept in physics, involving the transfer and conservation of energy in various processes.
Explanation:
What is Energy?
Energy is a fundamental concept in physics, often defined as the capacity to do work or cause change. The scientific concept of work corresponds to applying a force over a distance, like pushing a heavy object across the floor or lifting a weight. Energy can also be transferred and recognized in other forms, such as heat or light. There are various forms of energy, such as mechanical, electrical, kinetic, and potential energy. For instance, when inflating a bicycle tire, we do work by moving air against the resistance of the air already in the tire, exemplifying mechanical work.
In a broader sense, energy enables the movement of matter and the execution of actions, and it is conserved in physical processes, converting from one form to another but never disappearing.
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.
1. Which of the following is the ideal gas law?
Answer:
PV = nRT
Explanation:
P=pressure
V=volume
n=amount of substance
R=ideal gas constant
T=temperature
why does a perfume bottle burst when placed inside the flame
Answer:
It's because the perfume bottle contains ethyl alcohol.
HELP!!!
Zn+CuCl2→ZnCl2+Cu
How many grams of ZnCl2 will be produced from 7.00 grams of Zn and 8.00 grams of CuCl2?
Answer:
The answer to your question is 8.1 g of ZnCl₂
Explanation:
Data
mass of ZnCl₂ = ?
mass of Zn = 7.0 g
mass of CuCl₂ = 8 g
Balanced chemical reaction
Zn + CuCl₂ ⇒ ZnCl₂ + Cu
Process
1.- Calculate the molar mass of the reactants
Zn = 65.4 g
CuCl₂ = 63.6 + (35.5 x 2) = 134.6 g
2.- Calculate the limiting reactant
theoretical yield CuCl₂ / Zn = 134.6/65.4 = 2.06
experimental yield CuCl₂ / Zn = 8/7 = 1.1
The limiting reactant is CuCl₂ because the experimental yield was lower than the theoretical yield.
3.- Use proportions to calculate the mass of ZnCl₂
molar mass of ZnCl₂ = 65.4 + (35.5 x 2) = 136.4 g
134.6 g of CuCl₂ ---------------- 136.4 g of ZnCl₂
8 g ---------------- x
x = (8 x 136.4) / 134.6
x = 8.1 g of ZnCl₂
What is carrying capacity?
A: the maximum number of species that can live together in an area
B: the maximum population that can be supported in an area
C: the maximum population that can reproduce in an area
D: the maximum number of predators that live in an area
the answer is B
Answer:
its b I believe of it's not sorry
Answer:the answer is b
Explanation:
A fish is swimming at a constant rate towards the ocean floor. The equation
y=−7x−3
can be used to represent this situation, where
y
is the depth of the fish in meters below the sea level and
x
is the number of seconds the fish has been swimming. Which statement best describes the depth of the fish, given the situation?
Answer: The answer is c
Explanation:
Sort the phrases based on whether they describe or give an example of diffusion, facilitated diffusion, both, or neither. note: if you answer any part of this question incorrectly, a single red x will appear indicating that one or more of the phrases are sorted incorrectly.
Question:
a. Diffusion
b. Facilitated diffusion
c. Both
d. Neither
1. movement to area of lower concentration
2. movement across a membrane
3. steroid transport into cell
4. requires energy
5. movement assisted by proteins
6. glucose transport into cell
Answer:
The sorting is as follows
a. (1)
b. (5 and 6)
c. (1 and 2)
d. (4)
Explanation:
Diffusion is the movement of particles across a membrane from a high concentration region to one with a lower concentration of the diffusing substance
Here we have the correct sorting as follows
a. Diffusion
3. steroid transport into cell
b. Facilitated diffusion
5. movement assisted by proteins
6. glucose transport into cell
c. Both
1. movement to area of lower concentration
2. movement across a membrane
d. Neither
4. requires energy
Imagine it took 300 mL of 0.1 M LiOH to reach the first equivalence point and an additional 300 mL of 0.1 M LiOH (600 mL total) to reach the second equivalence point. How many moles of H2 were in the original acid solution
Answer:
0.03 mol H₂
Explanation:
In a diprotic acid titration, the first equivalence point relates to the equilibrium:
H₂A + OH⁻ ↔ HA⁻ + H₂OAnd the second equivalence point to:
HA⁻ + OH⁻ ↔ A⁻² + H₂OWe can add those two equations and we're left with:
H₂A + 2OH ⁻ ↔ A⁻² + 2H₂OSo to calculate the moles of H₂ that were in the original acid solution we use the total volume used (in this case 600 mL).
600 mL ⇒ 600/1000 = 0.6 L
We calculate the moles of LiOH, using its molar concentration:
0.1 M * 0.6 L = 0.06 mol LiOHAnd now we convert moles of LiOH (or OH⁻) to moles of H₂ using the stoichiometric ratio:
0.06 mol LiOH * [tex]\frac{1molH_{2}A}{2molLiOH}[/tex] = 0.03 mol H₂What is the concentration of 60 mL of H3PO4 if it is neutralized by 225 mL of 2 M Ba(OH)2?
7.5 M is the concentration of 60 ml of H3PO4 if it is neutralized by 225 ml of 2 M Ba(OH)2.
Explanation:
Data given:
volume of phosphoric acid, Vacid =60 ml
volume of barium hydroxide, Vbase = 225 ml
molarity of barium hydroxide, Mbase = 2M
Molarity of phosphoric acid, Macid =?
the formula for titration is used as:
Macid x Vacid = Mbase x Vbase
rearranging the equation to get Macid
Macid = [tex]\frac{Mbase x Vbase}{Vacid}[/tex]
Macid =[tex]\frac{225 X 2}{60}[/tex]
Macid = 7.5 M
the concentration of the phosphoric acid is 7.5 M and the volume is 60 ml. Thus 7.5 M solution of phosphoric acid is used to neutralize the barium hydroxide solution of 2M.
Answer:
= 5 M
Explanation:
2H3PO4 + 3Ba(OH)2 ----> Ba3(PO4)2 + 3H2O
moles Ba(OH)2 = molarity x litres
= 2 M x 0.225 L
= 0.45 mol
3 moles Ba(OH)2 react with 2 moles H2SO4
So moles H2SO4 = 2/3 x moles Ba(OH)2
= 0.3 mol
molarity = moles / litres
= 0.3 mol / 0.06 L
=5M
a strong acid, HA, is added to water. Which statement about the solution is true
Answer:
C) It contains little or no HA.
Explanation:
PLZ HELP
A chemist dissolves an ionic compound in water. The vapor pressure of the solution is _____. less than the vapor pressure of pure water equal to the vapor pressure of pure water greater than the vapor pressure of pure water
The vapor pressure of a solution with a dissolved ionic compound is less than the vapor pressure of pure water. To determine the molecular formula of the compound Xy, calculate the moles of Xy using its total mass and molar mass, then find the subscript y for the number of Y atoms or groups present.
When a chemist dissolves an ionic compound in water, the vapor pressure of the solution is less than the vapor pressure of pure water. This phenomenon is explained by Raoult's law, which states that the vapor pressure of a solvent above a solution is lowered by the presence of a non-volatile solute. In the given question, after dissolving 110 g of substance Xy in 500 g of water, the vapor pressure drops from 17.5 mmHg to 15.0 mmHg. This decrease is due to the solute particles in the solution, which interfere with the evaporation process of the solvent (water) molecules.
To determine the molecular formula of the substance Xy, you first need to calculate the number of moles of Xy. Then, use the total mass of Xy and its molecular mass to find the number value of the subscript y in the molecular formula. Here's how the calculation is done:
Why doesn't clouds formation take place until the dew point temperature is reached
Answer:
Clouds form when air reaches its dew point, the temperature when the air is saturated. This can happen in two ways. First, the air temperature can stay the same while the humidity increases. This is common in locations that are warm and humid.
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Explanation:
Final answer:
Clouds form when the air temperature cools to the dew point, causing water vapor to condense into liquid droplets around condensation nuclei. Without reaching this temperature, the air cannot saturate and clouds will not form. Understanding dew point is essential for predicting weather conditions.
Explanation:
Cloud formations occur in the atmosphere when the air temperature cools to the dew point, the temperature at which water vapor present in the air begins to condense into liquid water droplets, forming clouds. The air must reach saturation, which can happen either by adding moisture through evaporation or by cooling the air until it can no longer hold the water vapor, causing condensation.
Clouds may form due to contact cooling or uplift mechanisms, where air rises, expands, and cools. Condensation also necessitates the presence of condensation nuclei such as dust or smoke particles, around which moisture droplets can form. The importance of dew point lies in its role in forecasting weather; when the air temperature drops to the dew point, latent heat is released, stopping the temperature from falling further, and possibly leading to precipitation if clouds are formed.
hi um whats a single and double reaction
Answer:
A single-replacement reaction is a chemical reaction in which one element is substituted for another element in a compound, generating a new element and a new compound as products.
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).
Two of the main dangers for the icebreaker ship Polarstern during their year-long stay in the frozen Arctic ocean are 1) the ship being crushed by the frozen ice and 2) polar bears. True False
Answer: True.
Explanation: Two icebreaker ship polarstern from Germany and the Akademik fedoeov from Russia sailed on a mission towards central Arctic. Their tasks were to find an ice floe so strong and thick it would ultimately freeze the polarstern, entrapping the ship for a whole year within the ice.
There is the danger of been attack by polar bears, because polar bears lives in the Arctic. And there is also the risk of the ship been crushed by frozen ice.
how many moles of glucose are in 19.1 g of glucose
Answer:
There are 0,106 mol of glucose in 19,1g.
Explanation:
First we calculate the weight of 1 mole of Glucose whose molecular formula is C6 H12 0 6, with the atomic weights of each element obtained from the periodic table. Then, by means of a simple rule of three we calculate the moles that are in 19.1 grams:
Weight 1 mol C6H1206 = (Weight C)x 6 + (Weight H)x12 + (Weight 0)x6=
= 12 g x 6 + 1g x12 + 16 g x 6= 180 g/mol
180 g ----1 mol glucose
19,1 g-----x= (19,1 g x 1 mol glucose)/ 180 g= 0,106 mol
Final answer:
To find the number of moles of glucose in 19.1 grams, divide the mass by the molar mass of glucose (180 g/mol), resulting in approximately 0.106 moles.
Explanation:
The student's question is about determining the number of moles of glucose in a given mass of glucose. To calculate this, we need to use the molar mass of glucose, which is 180 g/mol. The mass of glucose given is 19.1 grams.
To find the number of moles, we use the formula:
Number of moles = mass (g) / molar mass (g/mol)
So for glucose, it would be:
Number of moles of glucose = 19.1 g / 180 g/mol
Calculating this gives us:
Number of moles of glucose = 0.106 moles (rounded to three decimal places)
Dioxin is a by-product of various industrial chemical processes. It is suspected of causing cancer and birth defects in both humans and other animals. Apparently, it acts by entering cells and binding to proteins, altering the pattern of gene expression. Therefore, it is reasonable to propose that dioxin acts by mimicking _____.
Answer:
The answer to the given question is: dioxin acts by mimicking the role of transcription factors.
Explanation:
Dioxin acts by mimicking the action of regulatory proteins that influence the binding of RNA polymerase to a promoter.
Transcription occurs in the three steps—initiation, elongation, and termination. Transcription factors are proteins that controls the rate of transcription of genetic information from DNA to messenger RNA, by binding to a specific DNA sequence. Transcription factors are directly involved in regulating gene expression.
Transcription factors are a very diverse family of proteins and generally function in multi-subunit protein complexes.
Dioxins are unwanted by-products of a wide range of manufacturing processes that are harmful to health. They can cause problems with reproduction, development, and the immune system. They can also disrupt hormones and lead to cancer.
Dioxins have no common uses. They are manufactured on a small scale for chemical and toxicological research.
Dioxins are absorbed into the human body through the digestive and respiratory tracts or through skin contact. They are then distributed throughout the body. Once dioxins enter the body, they last a long time because of their chemical stability and their ability to be absorbed by fat tissue.
The highest levels of dioxins are found in some soils, consumer products such as; cigarettes, pesticides, and herbicides, sediments and food, especially fatty foods such as meat, poultry, seafood, milk, egg and their products.
Dioxin is a by-product of various industrial chemical processes. It is suspected of causing cancer and birth defects in both humans and other animals. Apparently, it acts by entering cells and binding to proteins, altering the pattern of gene expression. Therefore, it is reasonable to propose that dioxin acts by mimicking the role of transcription factors.
Dioxin acts by mimicking the action of regulatory proteins that influence the binding of RNA polymerase to a promoter.
Transcription occurs in the three steps—initiation, elongation, and termination. Transcription factors are proteins that controls the rate of transcription of genetic information from DNA to messenger RNA, by binding to a specific DNA sequence. Transcription factors are directly involved in regulating gene expression.
Transcription factors are a very diverse family of proteins and generally function in multi-subunit protein complexes.
Dioxins are unwanted by-products of a wide range of manufacturing processes that are harmful to health. They can cause problems with reproduction, development, and the immune system. They can also disrupt hormones and lead to cancer.
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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