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# Stoichiometry: Wish We Had Some Teddy-Grams Quiz

Think you’ve got your head wrapped around Stoichiometry? Put your knowledge to the test. Good luck — the Stickman is counting on you!
Q. What is the total mass of iron in 1.0 mole of Fe2O3?

72 g
112 g
56 g
160 g
None of the above
Q. Consider the following reaction: CH4 + 2 O2 → CO2 + 2 H2O. If 3 moles of CH4 is reacted with 4 moles of O2, what reagent is the limiting reagent?

CH4
O2
CO2
H2O
None of the above
Q. Consider the following reaction: CH4 + 2 O2 → CO2 + 2 H2O. If 4 moles of CH4 reacts with 10 moles of O2, which of the following is FALSE?

CH4 is the limiting reagent.
O2 is the excess reagent.
The reaction would produce 8 moles of H2O.
Two moles of O2 would be left over.
None of the above
Q. What is the percent composition by mass of sulfur in H2SO4?

98%
16%
65%
33%
None of the above
Q. Consider the unbalanced equation H2S + O2 → H2O + SO2. When this equation is balanced using the smallest whole numbers, what is the sum of all of the coefficients?

9
11
7
5
None of the above
Q. How many grams are there in 2.5 moles of C2H5OH?

18 grams
115 grams
46 grams
0.05 grams
None of the above
Q. Which quantity is equivalent to 146 grams of NaCl?

1.0 mole
2.5 moles
2.0 moles
1.5 moles
None of the above
Q. Which represents the greatest mass of chlorine?

1 atom of chlorine
1 molecule of chlorine
1 mole of chlorine
1 gram of chlorine
None of the above
Q. Consider the following reaction: 2 Na + 2 H2O → 2 NaOH + H2. What is the total number of moles of hydrogen produced when 4 moles of sodium react completely?

1
2
3
4
None of the above
Q. How many grams of hydrogen are in 46 g of CH4O?

2.8 g
184 g
0.36 g
1.5 g
5.8 g