Stoichiometry

The study of quantitative relationships that can be derived from chemical formulas or chemical equations is known as
1. stoichiometry
2. trigonometry
3. formulometry
4. what chapter are we on again??
The reactant you run out of first is known as
1. the limiting reactant
2. the excess reactant
3. the absent reactant
4. the running reactant
Once the limiting reactant is all used up in a reaction, the left-over reactant is known as
1. the excess reactant
2. the limiting reactant
3. the limited reactant
4. the product
When we use a balanced equation to predict the number of grams of a product in a reaction, we get the
1. theoretical yield
2. actual yield
3. percent yield
4. product yield
The actual number of grams of a product in a chemical reaction is called the
1. theoretical yield
2. actual yield
3. percent yield
4. product yield
The percentage that compares the actual yield to the theoretical yield is called
1. experimental yield
2. percent error
3. percent yield
4. experimental error
In order to calculate percent error, you must
1. take the actual yield divided by the theoretical yield, and multiply by 100
2. take the theoreticall yield divided by the actual yield, and multiply by 100
3. take the actual yield minus the theoretical yield, divide by the theoretical yield, and multiply by 100
4. all of the above, then take the most logical number
When ammonia reacts with oxygen gas, nitrogen gas and water are formed. If 4 moles of ammonia (NH₃) are used, how many moles of water are formed?
1. 2
2. 3
3. 4
4. 6
When ammonia reacts with oxygen gas, nitrogen gas and water are formed. If 4 moles of nitrogen gas are produced, how many moles of oxygen were used?
1. 2
2. 3
3. 4
4. 6
When ammonia reacts with oxygen gas, nitrogen gas and water are formed. If 4.5 moles of oxygen gas are used, how many moles of nitrogen gas are formed?
1. 2
2. 3
3. 4
4. 6
Lithium and oxygen react explosively to form lithium oxide. How many moles of lithium oxide will form if 2 moles of lithium react?
1. 1
2. 2
3. 1.5
4. 3
Hydrogen peroxide (H₂O₂) decomposes to form water and oxygen gas. How many moles of oxygen gas are formed if 5 moles of hydrogen peroxide decompose?
1. 1
2. 2.5
3. 5
4. 2
Milk of magnesia is simply a suspension of magnesium hydroxide and water. When the magnesium hydroxide reacts with the hydrochloric acid in your stomach, water and magnesium chloride are produced. What is the mass in grams of magnesium chloride produced if 3 grams of magnesium hydroxide react?
1. 4.90 g
2. 9.8 g
3. 2.45 g
4. 6.23g
When the magnesium hydroxide reacts with the hydrochloric acid in your stomach, water and magnesium chloride are produced. What mass of HCl is required to completely react with 3 grams of magnesium chloride?
1. 4.90 g
2. 3.75 g
3. 30.7 g
4. 11.5 g
Sodium fluoride is made from a simple synthesis reaction of sodium and fluorine. How many grams of sodium must be added to 50 grams of fluorine to make 2 moles of sodium fluoride?
1. 61 g
2. 50 g
3. 38 g
4. 65 g
When sodium chloride reacts with silver nitrate, silver chloride and sodium nitrate are produced. What mass of silver chloride is produced from 75 grams of silver nitrate?
1. 63.3 g
2. 182 g
3. 126.5 g
4. 33.5 g
Acetylene gas (C₂H₂) reacts with oxygen in a combustion reaction to form carbon dioxide and water. How many grams of carbon dioxide are formed when 2.50 X 10⁴ grams of acetylene gas burns completely?
1. 8.74 X 10⁴ grams
2. 1.73 X 10⁴ grams
3. 8.74 X 10^-4 grams
4. 1.73 X 10^-4 grams
When CaC₂ react with water, acetylene gas (C₂H₂) and Ca(OH)₂ are formed. If 32 grams of CaC₂ are consumed in the reaction, how many moles of water are needed?
1. 0.998 moles
2. 3 moles
3. 0.499 moles
4. 2.500 moles
When CaC₂ react with water, acetylene gas (C₂H₂) and Ca(OH)₂ are formed. If 32 grams of CaC₂ are consumed in the reaction, how many moles calcuim hydroxide are formed?
1. 0.998 moles
2. 3 moles
3. 0.499 moles
4. 2.500 moles
Carbon monoxide reacts with hydrogen gas to form CH₃OH. If 500 moles of CO react with 750 moles of hydrogen gas, which is the limiting reactant?
1. hydrogen gas
2. CH₃OH
3. carbon monoxide
4. not enough information given
Carbon monoxide reacts with hydrogen gas to form CH₃OH. If 500 moles of CO react with 750 moles of hydrogen gas, how many moles of the excess reactant remain unchanged?
1. 375 moles
2. 625 moles
3. 125 moles
4. not enough information given
Carbon monoxide reacts with hydrogen gas to form CH₃OH. If 500 moles of CO react with 750 moles of hydrogen gas, how many moles of CH₃OH are formed?
1. 375 moles
2. 625 moles
3. 125 moles
4. not enough information given
Carbon disulfide and oxygen react to yield carbon dioxide and sulfur dioxide. If 1 mole of CS₂ is combined with 1 mole of oxygen, what is the limiting reactant?
1. oxygen
2. sulfur dioxide
3. carbon dioxide
4. carbon disulfide
Carbon disulfide and oxygen react to yield carbon dioxide and sulfur dioxide. If 1 mole of CS₂ is combined with 1 mole of oxygen, how many moles of excess reactant remain?
1. 0.667 moles
2. 0.334 moles
3. 1.25 moles
4. none
Carbon disulfide and oxygen react to yield carbon dioxide and sulfur dioxide. If 1 mole of CS₂ is combined with 1 mole of oxygen, how many moles of sulfur dioxide are formed?
1. 0.667 moles
2. 0.334 moles
3. 1.25 moles
4. none
If 2.5 mol of copper and 5.5 mol of silver nitrate are available to react by single replacement, what is the limiting reactant?
1. copper
2. silver nitrate
3. copper nitrate
4. silver
If 2.5 mol of copper and 5.5 mol of silver nitrate are available to react by single replacement, how many moles of excess reactant remain?
1. 0.5 mol
2. 2.5 mol
3. 5.0 mol
4. none
If 2.5 mol of copper and 5.5 mol of silver nitrate are available to react by single replacement, how many grams of copper nitrate are formed?
1. 460 g
2. 539 g
3. 250 g
4. 500 g
If 2.5 mol of copper and 5.5 mol of silver nitrate are available to react by single replacement, how many grams of silver are formed?
1. 460 g
2. 539 g
3. 250 g
4. 500 g
In an experiement, students determined the theoretical yield to be 12 grams. Their percent yield was 90 percent. What was their actual yield?
1. 10.8 g
2. 7.5 g
3. 13.3 g
4. 5.3 g
In an experiement, students determined the theoretical yield to be 20 grams. Their actual yield was 15 grams. What was their percent yield?
1. 75%
2. 7.5%
3. 1.33%
4. 133%
Coal (carbon) reacts with water to form methane gas (CH₄) and carbon dioxide. If the reaction has a percent yield of 85 percent, how much methane can be obtained from 1250 grams of carbon?
1. 710 grams
2. 1250 grams
3. 625 grams
4. 1062.5 grams
Sulfuric acid reacts with sodium hydroxide to yield sodium sulfate and water. If 37 grams of sulfuric acid react with 30 grams of sodium hydroxide, how many grams of sodium sulfate are produced?
1. 37 grams
2. you gotta be kidding me....
3. 53 grams
4. 14 grams
Sulfuric acid reacts with sodium hydroxide to yield sodium sulfate and water. If 37 grams of sulfuric acid react with 30 grams of sodium hydroxide, how many grams of water are produced?
1. 37 grams
2. I need a bit more time...
3. 53 grams
4. 14 grams
Solid sulfur reacts with oxygen gas to produce gaseous sulfur dioxide. Assuming standard temperature and pressure, what mass of sulfur must be used to produce 12.61 liters of gaseous sulfur dioxide?
1. 18.0 g
2. 22.4 g
3. 11.2 g
4. 12.61 g
How many grams of water can be produced from the compete reaction of 3.44 liters of oxygen gas with hydrogen gas (assuming standard temp and pressure)?
1. 5.53 g
2. 18.02 g
3. 22.4 g
4. 1.34 g

Stoichiometry

Multiple-Choice ExerciseContent © 2006 Melanie Cecere; Authors of Activity: Melanie Cecere & Tami Maloney; All rights reserved. No commercial, for-profit use of this material is allowed. E-mail comments and questions to Tami Maloney.

The study of quantitative relationships that can be derived from chemical formulas or chemical equations is known as

The reactant you run out of first is known as

Once the limiting reactant is all used up in a reaction, the left-over reactant is known as

When we use a balanced equation to predict the number of grams of a product in a reaction, we get the

The actual number of grams of a product in a chemical reaction is called the

The percentage that compares the actual yield to the theoretical yield is called

In order to calculate percent error, you must

When ammonia reacts with oxygen gas, nitrogen gas and water are formed. If 4 moles of ammonia (NH3) are used, how many moles of water are formed?

When ammonia reacts with oxygen gas, nitrogen gas and water are formed. If 4 moles of nitrogen gas are produced, how many moles of oxygen were used?

When ammonia reacts with oxygen gas, nitrogen gas and water are formed. If 4.5 moles of oxygen gas are used, how many moles of nitrogen gas are formed?

Lithium and oxygen react explosively to form lithium oxide. How many moles of lithium oxide will form if 2 moles of lithium react?

Hydrogen peroxide (H2O2) decomposes to form water and oxygen gas. How many moles of oxygen gas are formed if 5 moles of hydrogen peroxide decompose?

Milk of magnesia is simply a suspension of magnesium hydroxide and water. When the magnesium hydroxide reacts with the hydrochloric acid in your stomach, water and magnesium chloride are produced. What is the mass in grams of magnesium chloride produced if 3 grams of magnesium hydroxide react?

When the magnesium hydroxide reacts with the hydrochloric acid in your stomach, water and magnesium chloride are produced. What mass of HCl is required to completely react with 3 grams of magnesium chloride?

Sodium fluoride is made from a simple synthesis reaction of sodium and fluorine. How many grams of sodium must be added to 50 grams of fluorine to make 2 moles of sodium fluoride?

When sodium chloride reacts with silver nitrate, silver chloride and sodium nitrate are produced. What mass of silver chloride is produced from 75 grams of silver nitrate?

Acetylene gas (C2H2) reacts with oxygen in a combustion reaction to form carbon dioxide and water. How many grams of carbon dioxide are formed when 2.50 X 104 grams of acetylene gas burns completely?

When CaC2 react with water, acetylene gas (C2H2) and Ca(OH)2 are formed. If 32 grams of CaC2 are consumed in the reaction, how many moles of water are needed?

When CaC2 react with water, acetylene gas (C2H2) and Ca(OH)2 are formed. If 32 grams of CaC2 are consumed in the reaction, how many moles calcuim hydroxide are formed?

Carbon monoxide reacts with hydrogen gas to form CH3OH. If 500 moles of CO react with 750 moles of hydrogen gas, which is the limiting reactant?

Carbon monoxide reacts with hydrogen gas to form CH3OH. If 500 moles of CO react with 750 moles of hydrogen gas, how many moles of the excess reactant remain unchanged?

Carbon monoxide reacts with hydrogen gas to form CH3OH. If 500 moles of CO react with 750 moles of hydrogen gas, how many moles of CH3OH are formed?

Carbon disulfide and oxygen react to yield carbon dioxide and sulfur dioxide. If 1 mole of CS2 is combined with 1 mole of oxygen, what is the limiting reactant?

Carbon disulfide and oxygen react to yield carbon dioxide and sulfur dioxide. If 1 mole of CS2 is combined with 1 mole of oxygen, how many moles of excess reactant remain?

Carbon disulfide and oxygen react to yield carbon dioxide and sulfur dioxide. If 1 mole of CS2 is combined with 1 mole of oxygen, how many moles of sulfur dioxide are formed?

If 2.5 mol of copper and 5.5 mol of silver nitrate are available to react by single replacement, what is the limiting reactant?

If 2.5 mol of copper and 5.5 mol of silver nitrate are available to react by single replacement, how many moles of excess reactant remain?

If 2.5 mol of copper and 5.5 mol of silver nitrate are available to react by single replacement, how many grams of copper nitrate are formed?

If 2.5 mol of copper and 5.5 mol of silver nitrate are available to react by single replacement, how many grams of silver are formed?

In an experiement, students determined the theoretical yield to be 12 grams. Their percent yield was 90 percent. What was their actual yield?

In an experiement, students determined the theoretical yield to be 20 grams. Their actual yield was 15 grams. What was their percent yield?

Coal (carbon) reacts with water to form methane gas (CH4) and carbon dioxide. If the reaction has a percent yield of 85 percent, how much methane can be obtained from 1250 grams of carbon?

Sulfuric acid reacts with sodium hydroxide to yield sodium sulfate and water. If 37 grams of sulfuric acid react with 30 grams of sodium hydroxide, how many grams of sodium sulfate are produced?

Sulfuric acid reacts with sodium hydroxide to yield sodium sulfate and water. If 37 grams of sulfuric acid react with 30 grams of sodium hydroxide, how many grams of water are produced?

Solid sulfur reacts with oxygen gas to produce gaseous sulfur dioxide. Assuming standard temperature and pressure, what mass of sulfur must be used to produce 12.61 liters of gaseous sulfur dioxide?

How many grams of water can be produced from the compete reaction of 3.44 liters of oxygen gas with hydrogen gas (assuming standard temp and pressure)?

Multiple-Choice Exercise
Content © 2006 Melanie Cecere; Authors of Activity: Melanie Cecere & Tami Maloney; All rights reserved. No commercial, for-profit use of this material is allowed. E-mail comments and questions to Tami Maloney.

When ammonia reacts with oxygen gas, nitrogen gas and water are formed. If 4 moles of ammonia (NH₃) are used, how many moles of water are formed?

Hydrogen peroxide (H₂O₂) decomposes to form water and oxygen gas. How many moles of oxygen gas are formed if 5 moles of hydrogen peroxide decompose?

Acetylene gas (C₂H₂) reacts with oxygen in a combustion reaction to form carbon dioxide and water. How many grams of carbon dioxide are formed when 2.50 X 10⁴ grams of acetylene gas burns completely?

When CaC₂ react with water, acetylene gas (C₂H₂) and Ca(OH)₂ are formed. If 32 grams of CaC₂ are consumed in the reaction, how many moles of water are needed?

When CaC₂ react with water, acetylene gas (C₂H₂) and Ca(OH)₂ are formed. If 32 grams of CaC₂ are consumed in the reaction, how many moles calcuim hydroxide are formed?

Carbon monoxide reacts with hydrogen gas to form CH₃OH. If 500 moles of CO react with 750 moles of hydrogen gas, which is the limiting reactant?

Carbon monoxide reacts with hydrogen gas to form CH₃OH. If 500 moles of CO react with 750 moles of hydrogen gas, how many moles of the excess reactant remain unchanged?

Carbon monoxide reacts with hydrogen gas to form CH₃OH. If 500 moles of CO react with 750 moles of hydrogen gas, how many moles of CH₃OH are formed?

Carbon disulfide and oxygen react to yield carbon dioxide and sulfur dioxide. If 1 mole of CS₂ is combined with 1 mole of oxygen, what is the limiting reactant?

Carbon disulfide and oxygen react to yield carbon dioxide and sulfur dioxide. If 1 mole of CS₂ is combined with 1 mole of oxygen, how many moles of excess reactant remain?

Carbon disulfide and oxygen react to yield carbon dioxide and sulfur dioxide. If 1 mole of CS₂ is combined with 1 mole of oxygen, how many moles of sulfur dioxide are formed?

Coal (carbon) reacts with water to form methane gas (CH₄) and carbon dioxide. If the reaction has a percent yield of 85 percent, how much methane can be obtained from 1250 grams of carbon?