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- 1. Multiple Choice
With the equation given below, how many grams of Fe are required to react with 36 g of O2?
4 Fe + 3 O2 --> 2 Fe2O3
1.50 g
83.78 g
18.02 g
1.125 g
- 2. Multiple Choice
In the reaction of sodium reacting with oxygen gas to form sodium oxide. The theoretical yield is calculated to be 2.5g, but 2.0 g of sodium oxide is actually recovered in the lab. Determine the % yield of sodium oxide.
.8%
77.4%
80%
125%
- 3. Multiple Choice
With the equation given below, how many atoms of zinc are required to produce 2 mol ZnCl2?
Zn + 2 HCl --> ZnCl2 + H2
2
3.0 x 1023
6.0 x 1023
1.2 x 1024
- 4. Multiple Choice
With the equation given below, how many grams of hydrogen gas are produced when 100 g of hydrochloric acid (HCl) reacts.
Zn + 2 HCl --> ZnCl2 + H2
2.8 g
1.4 g
50 g
35 g
- 5. Multiple Choice
In the reaction of:
CH4 + 2 O2 --> CO2 + 2 H2O
What is the ratio of moles CH4 to moles O2?
For every 1 mol CH4, there is 1 mol O2
For every 1 mol CH4, there are 2 mol O2
For every 4 mol CH4, there are 2 mol O2
- 6. Multiple ChoiceWhat is the mole ratio of H2O to H3PO4 in the following chemical equation? P4O10 + 6 H2O --> 4 H3PO46:44:61:33:1
- 7. Multiple ChoiceUsing 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 Fe6 moles Fe9 moles Fe2 moles Fe - 8. Multiple ChoiceN2 + 3H2 → 2NH3
How many moles of hydrogen are needed to react with 2 moles of nitrogen?6231 - 9. Multiple Choice
4 Al + 3 O2 –> 2 Al2O3 How much aluminum would be needed to completely react with 45 grams of O2?
1.05 moles
3.75 moles
0.875 grams
1.875 moles
- 10. Multiple Choice2Al + 3H2SO4 -> Al2(SO4)3 + 3H2
How many grams of aluminum sulfate would be formed if 250g H2SO4 completely reacted with aluminum?0.85 g290 g450 g870 g - 11. Multiple Choice
2A + 3B --> C + 4D
If 4.0 moles of A reacts with 5.0 moles of B, how many moles of D will be produced?
4.0 moles of D
5.0 moles of D
6.7 moles of D
8.0 moles of D
- 12. Multiple Choice
2A + 3B --> C + 4D
If 4.0 moles of A reacts with 5.0 moles of B, how many moles of excess remain?
.67 moles of excess
3.3 moles of excess
4.0 moles of excess
6.7 moles of excess
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