Free Printable Stoichiometry Practice 2

Worksheets

Stoichiometry Practice 2

Total questions: 20

Worksheet time: 5hrs 32mins

Name

Class

Date

You need 2 pieces of bread, 1 tablespoon of peanut butter and 2 tablespoons of jelly to make a sandwich. If you have 10 pieces of bread, 4 tablespoons of peanut butter and 20 tablespoons of jelly, what is the limiting reactant?

bread

jelly

peanut butter

sandwich

Identify the limiting reagent when 6.00 moles HCl combines with 5.00 moles Mg to form MgCl₂.

1 Mg + 2 HCl --> 1 MgCl₂ + 1 H₂

H₂

MgCl₂

HCl

Theoretical yield = 73g

Actual yield = 62g

Calculate the percent yield.

116%

85%

1.16%

76%

A reaction was predicted to produce 32.4 grams of a compound. When the product was measured, there were only 26.1 grams made. What is the percent yield?

80.6%

6.3%

24.1%

58.5%

Cl₂ + 2 KBr → Br₂ + 2 KCl

How many grams of potassium chloride can be produced from 356 g of Cl₂ and 356 g of potassium bromide?

749 g

223 g

479 g

814 g

Silver nitrate and sodium phosphate are reacted in equal amounts of 200 g each. How many grams of silver phosphate are produced?
3AgNO₃+ Na₃(PO₄) ---> Ag₃(PO₄) + 3NaNO₃

164 g

64 g

146 g

164 moles

4NH₃+ 5O₂--> 4NO + 6H₂O
How many grams of NO are formed if 6.30g of ammonia react with 1.80g of oxygen?

0.37g

0.045g

1.35g

11.1g

P₄+ 6Cl₂--> 4PCl₃The reaction of 75.0g P₄ with excess chlorine gas produces 110g PCl₃in lab. Find the theoretical yield and calculate percent yield for the reaction.

78%

64%

27%

33%

0.666 g of Al reacts with 2.53 g of CuCl₂. How many grams of Al are left over after the reaction is complete?

0.328 g Al

0.338 g Al

0.666 g Al

4.98 g Al

10.

If 0.666 g Al reacts with 2.53 g CuCl₂, and 1.01 g Cu are formed in the lab, what is the percent yield of Cu?

15.8 %

84.2 %

98.4 %

100.0 %

11.

C₃H₈+ 5 O₂ →3 CO₂ + 4 H₂O

If I start with 5 grams of C₃H₈, what is my theoretical yield of water? (O₂ is in excess)

8.2 grams

2.0 grams

11 grams

5.6 grams

12.

If a chemist calculates the maximum amount of product that could be obtained in a chemical reaction, he or she is calculating the

theoretical yield

mole ratio

actual yield

percentage yield

13.

2 KClO₃ → 2 KCl + 3 O₂
How many moles of oxygen are produced when 6.7 moles of KClO₃ decompose completely?

6.7 mol

1.0 mol

10.1 mol

4.5 mol

14.

Fe (s) + S (l) --> FeS (s)

In the experiment above, 7.62 g of Fe are allowed to react with 8.67 g of S.
How much FeS is formed?

14.8 g

12.2 g

13.7 g

19.9 g

15.

Fe (s) + S (l) --> FeS (s)

In the experiment above, 7.62 g of Fe are allowed to react with 8.67 g of S.

How much excess is left over?

4.38 g of S

4.29 g S

4.38 g of Fe

4.29 g Fe

16.

2 KClO₃ → 2 KCl + 3 O₂

How many grams of potassium chloride are produced when 3.2 moles of KClO₃ decompose completely?

119.28 g KCl

477.12 g KCl

238.56 g KCl

312.34 g KCl

17.

4NH₃+ 5O₂--> 4NO + 6H₂O
How many grams of NO are formed if 6.30g of ammonia react with 1.80g of oxygen?

0.37g

0.045g

1.35g

11.1g

18.

What is the limiting reactant if 15 moles of NH₃ react with 16 moles of NO?
4NH₃+6NO --> 5N₂ + 6H₂O

NH₃

N₂

water

19.

What is the limiting reactant if 10 moles of NH₃ react with 30.0 moles of NO?
4NH₃+6NO --> 5N₂ + 6H₂O

NH₃

N₂

water

20.

1 Cheese + 2 Bread --> 1 Grilled cheese
How many grilled cheeses can you make with 26 slices of bread and 14 pieces of cheese?

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Stoichiometry Practice 2

Total questions: 20

Worksheet time: 5hrs 32mins

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