Free Printable Unit 6 Review Practice

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Unit 6 Review Practice

Total questions: 20

Worksheet time: 41mins

Name

Class

Date

Is the following equation balanced?

Al + O₂ ---> 2Al₂O₃

YES

Balance this equation:

H₂ + Cl₂ ---> HCl

It is balanced.

H₂ + Cl₂ ---> 2HCl

3H₂ + Cl₂ ---> 6HCl

H₂ + 3Cl₂ ---> 6HCl

How many HCl molecules do you need to balance this equation?
Mg + __HCl ---> MgCl₂ + H₂

What is the molar mass of table salt (NaCl)?

116.886 g/mol

35.453 g/mol

22.990 g/mol

58.443 g/mol

Calculate the molar mass of NH₄NO₂

50 g/mol

60 g/mol

64 g/mol

78 g/mol

Which would have more atoms?

1 mole of Li

1 mole of Au

1 mole of Si

None, all are equal

Calculate the molar mass of Cu₂O.

37 g/mol

45 g/mol

79.5 g/mol

143 g/mol

How many moles are in 16.94g of water?

16.94 mol H₂O

0.9401 mol H₂O

305.3 mol H₂O

1.063 mol H₂O

What is the mass in grams of 5.90 mol C₈H_18?

.0512 g

19.4 g

673 g

389 g

10.

How many moles are in 19.82 g Mg?

1.226mol Mg

481.7mol Mg

1.000mol Mg

0.8156 mol Mg

11.

N₂ + 3H₂ → 2NH₃

What is the mole ratio between N₂and NH₃ in the above reaction?

1 moles NH₃ / 2 moles N₂

2 moles NH₃ / 1 moles N₂

2 moles N₂ / 3 moles NH₃

1 moles N₂ / 3 moles NH₃

12.

Using the following equation:
Fe₂O₃(s) + 3H₂(g) → 2Fe(s) + 3H₂O(l)
How many moles of iron can be made from 6 moles H₂?

4 moles Fe

6 moles Fe

9 moles Fe

2 moles Fe

13.

N₂ + 3H₂ −-> 2NH₃
How many moles of ammonia are produced when 3 moles of nitrogen react with hydrogen?

6 moles ammonia

1.5 moles ammonia

9 moles ammonia

9 moles hydrogen

14.

True/False: Before you begin, you must be sure your equation is balanced

True

False

15.

Gas grills use propane fuel. The combustion of propane is represented in this equation:

C₃H₈+ 5O_{2 ---->}3CO₂ + 4H₂O. How many grams of propane will burn when 36.0 moles of water are formed?

0.500 g C₃H₈

9.00 g C₃H₈

318 g C₃H₈

397 g C₃H₈

16.

Use the equation 2 Al + 3 Cl₂ ---> 2 AlCl₃. If 2 moles of aluminum and 2 moles of chlorine are reacted, identify the limiting reactant.

AlCl3

Cl2

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.

CuCl₂ + 2NaNO₃ --> Cu(NO₃)₂ + 2NaCl

If 15.0 grams of CuCl2 react with 20 g of NaNO3, how much NaCl can be formed?

13.0 g of NaCl

98 g of NaCl

26 g of NaCl

17.4 of NaCl

19.

CuCl₂ + 2NaNO₃ --> Cu(NO₃)₂ + 2NaCl

If 11.3 g of NaCl are formed in the reaction, what is the percent yield of the reaction?

21.7%

68%

86.9%

99.99%

20.

Theoretical yield = 73g
Actual yield = 62g
Calculate the percent yield.

1.16%

116%

85%

76%

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Unit 6 Review Practice

Total questions: 20

Worksheet time: 41mins

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