Stoichiometry JeopardyStoichiometry Jeopardy

Mass-Mass Mass-Volume Percent

Yield Limiting

Reactants“Stoiched”

About Chemistry

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Q $500 Q $500 Q $500 Q $500

Final Jeopardy

$100 Mass-Mass

If 20.0 g of magnesium react with excess hydrochloric acid, how many grams of magnesium

chloride will be produced?

Mg + HCl -------> MgCI2 + H2

$100 Answer from Mass-Mass

39.2g MgCl2

$200 Mass-Mass

How many grams of aluminum would be required to produce 550 g of Fe using the

following reaction?

Al + Fe2O3 ------> Fe + Al2O3

$200 Answer from Mass-Mass

265.1g Al

$300 Mass-Mass

What mass of oxygen is needed to completely react with 84.9 g of Fe according to the

following reaction?

Fe + O2 ----> Fe2O

$300 Answer from Mass-Mass

12.2g O2

$400 Mass-Mass

Sodium oxide reacts with water to produce sodium hydroxide. What mass of sodium oxide must be

used to produce 275 grams of sodium hydroxide?

$400 Answer from Mass Mass

212.9g Na2O

$500 Mass Mass

When butane, C4H10 burns in oxygen, the products are carbon dioxide and water. What

mass of carbon dioxide will be produced when 4.42 g of butane is burned in excess

oxygen?

$500 Answer from Mass Mass

13.35g CO2

$100 Mass-Volume

In the following equation, what volume of hydrogen gas is produced when 135 grams of aluminum are completely reacted with excess sulfuric acid?    2 Al    +  3  H2SO4 ----------->    3 H2      +    Al2(SO4)3

$100 Answer from Mass-Volume

168.6 L H2

$200 Question from Mass-Volume

In the  reaction below, how many liters of   ammonia gas are produced when 35 grams of liquid nitrogen completely react with excess hydrogen?        N 2       +       3H2         ---------->        2 NH3

$200 Answer from Mass-Volume

56.0 L NH3

$300 Question from Mass-Volume

What volume of oxygen is produced in the decomposition reaction of 145.73 g sodium

chlorate ?

NaClO3 NaCl + O2

$300 Answer from Mass-Volume

15.3 L O2

$400 Question from Mass-Volume

How many grams of Al2O3 will be formed from 17.4 liters of O2?

Al + O2 Al2O3

$400 Answer from Mass-Volume

58.2 g Al2O3

$500 Question from Mass-Volume

How many liters of carbon dioxide will form from the combustion 320.0 grams of C5H12 with

excess oxygen?

$500 Answer from Mass-Volume

497.8 L CO2

$100 Question from % Yield

 

Calculate the theoretical yield of Calcium Oxide if 24.8 grams of Calcium Carbonate decomposes. Calculate

the percent yield if you got 13.1 grams in the laboratory.

CaCO3 → CaO + CO2

$100 Answer from % Yield

94%

$200 Question from % Yield

 What is the percent yield if you experimentally produce 3.65 grams of copper when 1.87 grams of Aluminum

reacts with 9.65 grams of Copper (II) Sulfate?

Al + CuSO4 → Cu + Al2(SO4)3

$200 Answer from % Yield

95%

$300 Question from % Yield

 

There are 100.0 grams of each reactant available. Determine the limiting reactant in this equation.

SO2 + 2NaOH → Na2SO3 + H2O

$300 Answer from % Yield

LR=NaOH

$400 Question from % Yield

 Find the theoretical yield of silicon carbide if 50.0 grams of silicon dioxide reacts with 79.1 grams of

Carbon.

 SiO2 + C → SiC + CO

$400 Answer from % Yield

33.3g SiC

$500 Question from % Yield

 

What is the percent yield if 155 grams of calcium carbonate is treated with 250 grams of hydrochloric acid

and 142 grams of calcium chloride is obtained?

CaCO3 + HCl → CaCl2 + CO2 + H2O

$500 Answer from % Yield

56.6%

$100 Question from Limiting Reactants

If 10.4 moles of hydrogen, H2, and 9.1 moles of oxygen, O2, are placed together in a container and allowed to react according to the equation. How many moles of water, H2O, would be produced by the reaction?

2 H2 + O2 2 H2O

$100 Answer from Limiting Reactants

10.4 mol H2O

$200 Question from Limiting Reactants

If 83.7 grams of aluminum, Al, and 195.2 grams of sulfur, S, are put into a container and allowed to

react according to the above equation, which substance(s) and how many grams of each would

be present in the container after the reaction is complete?

2 Al + 3 S Al2S3

$200 Answer from Limiting Reactants

LR= Al

$300 Question from Limiting reacatants

If 609.5 grams of vanadium (II) oxide, VO, and 832 grams of iron (III) oxide, Fe2O3,

are put into a container and allowed to react according to the equation above, which

substance(s) and how many grams of FeO would be present in the container after the reaction is

complete? 2 VO + 3 Fe2O3 6 FeO + V2O5

$300 Answer from Limiting Reactants

748.6g FeO

$400 Question from Limiting Reactants

Methyl alcohol (wood alcohol), CH3OH, is produced via the reaction

CO(g) + 2 H2(g) CH3OH(l)A mixture of 1.20 g H2(g) and 7.45 g CO(g) are allowed to

react. Which reagent is the limiting reagent?

$400 Answer from Limiting Reactants

8.5g CH3OH

$500 Question from Limiting Reactants

A welder has 20.0 moles of acetylene gas (C2H2) and 10.0 moles of oxygen gas (O2). They

combineto form water and carbon dioxide. Identify the limiting reactant. How many moles of carbon

dioxidegas (CO2) will form?

$500 Answer from Limiting Reactants

O2 yields 8.0 mol CO2

C2H2 yields 40.0 mol CO2

O2 is the limiting reactant

$100 Question from “Stoiched” About Chemistry

0.300 moles of bromine gas (Br2) and 0.500 moles of chlorine gas (Cl2) react to form tribromochlorine (Br3Cl).

How many moles of this product will form?

$100 Answer from “Stoiched” About Chemistry

0.2 mol Br3Cl

$200 Question from “Stoiched” About Chemistry

Determine the % yield when 7.80 grams of benzene (C6H6) burns in oxygen gas to form 3.00 grams

of CO2 gas and water vapor.

$200 Answer from “Stoiched” About Chemistry

11.5%

$300 Question from “Stoiched” About Chemistry

25.3 g of magnesium reacts with 44.3 g of copper (II) nitrate to form copper and magnesium nitrate.What mass of copper will form? What mass of

reactants will remain unreacted?

$300 Answer from “Stoiched” About Chemistry

16.Og Cu will form

19.3 g un-reacted reactants

$400 Question from “Stoiched” About Chemistry

2 NH3 + 2 O2 N2O + 3 H2OIf 80.0 grams of O2 are reacted in the above reaction, how

many grams of N2O will be produced?

$400 Answer from “Stoiched” About Chemistry

55.2g N2O

$500 Question from “Stoiched” About Chemistry

Methyl alcohol (wood alcohol), CH3OH, is produced via the reaction

CO(g) + 2 H2(g) CH3OH(l)A mixture of 1.20 g H2(g) and 7.45 g CO(g) are allowed to

react.• Which reagent is the limiting reagent?• What is the yield of CH3OH?

[Assume theoretical yield ing is what is wanted here.]• How much of the reagent present in excess is left

over?• Suppose the actual yield is 7.52 g of CH3OH. What is

the % yield?

$500 Answer from “Stoiched” About Chemistry

Final Jeopardy Question

Silicon nitride (Si3N4), a ceramic, is made by the direct combination of silicon and nitrogen at high temperature.

How much silicon must react with excess nitrogen to prepare 125 grams of silicon nitride if the yield of the

reaction is 95%?

Final Jeopardy Answer

70.1g Si