# Stoichiometry And Limiting Reagent Review

25 Questions | Attempts: 1203  Settings  With a lot of practice and exercises, Chemistry can be the simplest subjects of the all. Stoichiometry is the calculation of relative quantities of reaction products and reactants. The quiz below gauges your understanding on the subject.

• 1.
The disinfectant hydrogen peroxide, H2O2, decomposes to form water and oxygen gas.  How many moles of O2 will result from the decomposition of 5 mol of hydrogen peroxide?
• A.

2.5 mol H2O2

• B.

5 mol H2O2

• C.

3 mol H2O2

• D.

10 mol H2O2

• 2.
Starting with 31g of Al in the following reaction will produce hao many grams of Na? Na3PO4 + Al ---> AlPO4 + 3Na
• A.

8.8g

• B.

9.0g

• C.

79g

• D.

79.2g

• 3.
If you counted 6.0 x 10^24 molecules of hydrogen gas how many molecules of oxygen gas will be need to completely react the amount according to the following equation? 2H2 + O2 ---> 2H2O
• A.

3.0 x 10^23

• B.

1.2 x 10^24

• C.

3.0 x 10^24

• D.

1.2 x 10^25

• 4.
40.0g of Sugar(C6H12O6) will product what volume of carbon dioxide according to the following equation? C6H12O6 + 6O2 ---> 6H2O + 6CO2
• A.

0.829L

• B.

0.830L

• C.

29.8L

• D.

29.9L

• 5.
When reacting 448L of hydrogen gas with oxygen gas how many grams of water can be produced? 2H2 + O2 ---> 2H2O
• A.

360L

• B.

361L

• C.

362L

• D.

367L

• 6.
Starting with 20.5L of hydrogen gas how many molecules of amonia can be made according to this equation? N2 + 3H2 ---> 2NH3
• A.

8.26 x 10^22

• B.

3.67 x 10^23

• C.

8.26 x 10^23

• D.

3.67 x 10^24

• 7.
3.50 x 10^25 compounds of calcium carbonate will produce what volume of carrbon dioxide according to the following equation? CaCO3 ---> CaO + CO2
• A.

13L

• B.

130L

• C.

1300L

• D.

13000L

• 8.
If 25.0 g of each reactant were used in performing the following reaction, which would be the limiting reactant?      3PbO2 + Cr2(SO4)3 + K2SO4 + H2O ® 3PbSO4 + K2Cr2O7 + H2SO4
• A.

PbO2

• B.

H2O

• C.

K2SO4

• D.

PbSO4

• E.

Cr2(SO4)3

• 9.
Na + Cl2 --> NaCl (unbalanced)How many moles of chlorine gas (Cl2) would react with 5.0 moles of sodium (Na)        according to the following chemical equation?
• A.

1.0

• B.

1.5

• C.

2.0

• D.

2.5

• E.

3.0

• 10.
Na + Cl2 --> NaCl (unbalanced)Using the equation (after it is balanced) above, determine the amount of product that          can be produced  from 24.7 g Na.  (in grams)
• A.

55

• B.

62

• C.

71

• D.

82

• E.

84

• 11.
In the reaction C8H18 + O2 --> CO2 + H2O (unbalanced)If 27.3g of C8H18 are combusted, what mass of water will be produced?( in grams)
• A.

13.5

• B.

23.4

• C.

53.2

• D.

47.1

• E.

37.8

• 12.
CH4   +   O2  -->  CO2   +   2 H2OHow many moles of O2 are required to burn 0.5 moles of CH4?
• A.

1

• B.

2

• C.

3

• D.

4

• E.

5

• 13.
NaOH   +   HCl   --> NaCl   +   H2OHow many grams of NaOH will react with 36.5 g of HCl? ( in grams)
• A.

40

• B.

60

• C.

80

• D.

100

• E.

120

• 14.
How many moles of water is formed from the combustion of 5 moles of hydrogen gas in oxygen gas?
• A.

2.5

• B.

4

• C.

5

• D.

7

• E.

None of the above

• 15.
Methane gas (CH4) gets burned in oxygen (O2) to form carbon dioxide (CO2) and water vapor (H2O). The balanced reaction is
• A.

CH4 --> CO2 + 2H2O

• B.

2CH4 + O2 --> 2CO2 + 2H2O

• C.

CH4 + 2O2 --> CO2 + 2H2O

• D.

3CH4 + 2O2 --> CO2 + 2H2O

• E.

4CH4 + 2O2 --> 4CO2 + 2H2O

• 16.
Methane gas (CH4) gets burned in oxygen (O2) to form carbon dioxide (CO2) and water vapor (H2O). If I burn 10 grams of methane, how many grams of CO2 will be produced?
• A.

42.7 grams of CO2

• B.

833 grams of CO2

• C.

20 grams of CO2

• D.

27.4 grams of CO2

• E.

30 grams of CO2

• 17.
In the decomposition of water to hydrogen gas and oxygen gas, how many moles of water is needed to produce 10.0 moles of oxygen gas?
• A.

5.00

• B.

10.0

• C.

15.0

• D.

20.0

• E.

25.0

• 18.
In the decomposition of water to hydrogen gas and oxygen gas, how many moles of water is needed to produce 32 grams of oxygen gas?
• A.

0.5

• B.

1.0

• C.

1.5

• D.

2.0

• E.

2.5

• 19.
Coal can be converted to methane gas by a process called coal gasification.  The equation for the reaction is the following:2 C (s) + 2 H2O (l)  --> CH4 (g) + CO2 (g)What mass in grams of carbon is required to react with water to form 1.00 mol CH4?
• A.

48 g C

• B.

24.0 g C

• C.

12.0 g C

• D.

6 g C

• 20.
Nitrogen combines with oxygen in the atmosphere during lightning flashes to form nitrogen monoxide, NO, which then reacts further with O2 to produce nitrogen dioxide, NO2, according to the following equation:N2 (g) + O2 (g) --> 2 NO (g)2 NO (g) + O2 (g) --> 2 NO2 (g)   * Hint:  Use this equation to answer the question.What mass of NO2 is formed when NO reacts with 386 g of O2?
• A.

1110 g NO2

• B.

772 g NO2

• C.

555 g NO2

• D.

0.0111 g NO2

• 21.
Iron is produced from iron ore through the following reaction in a blast furnace:Fe2O3 (s) + 3 CO (g)  --> 2 Fe (s) + 3 CO2 (g)If 4.00 g of Fe2O3 are available to react, how many moles of CO are needed?(round answer to 3 sigfigs)
• A.

0.075141 mol CO

• B.

0.167 mol CO

• C.

0.08 mol CO

• D.

0.0751 mol CO

• 22.
If you have 4.5 moles of lead(IV) nitrate how many moles of silver nitrate can be produced according to the following reaction?Pb(NO3)4 + 4AgCl ---> 4AgNO3 + PbCl4
• A.

1.2 moles

• B.

4.5 moles

• C.

16 moles

• D.

18 moles

• 23.
Using the following equation how many liters of hydrogen gas will be needed to react with 5.0L of oxygen gas?2H2 + O2 ---> 2H2O
• A.

2.5L

• B.

11 L

• C.

10 L

• D.

32.0L

• 24.
If 25g of NaCl is produced by the following reaction howmany atome of sodium would be required?2Na + Cl2 ---> 2NaCl
• A.

2.75 x 10^23

• B.

2.6 x 10^23

• C.

5.2 x10^23

• D.

5.75 x 10^23

• 25.
If starting with 1.2 x 10^24 atoms of potassium how many grams of potassium oxide can you produce using the following equation? (round to 2 sig figs)4K + O2 ---> 2K2O
• A.

9.39g

• B.

9.4g

• C.

93.9g

• D.

94g

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