2. Hydrochloric acid reacts with calcium carbonate yielding calcium chloride, water, and carbon dioxide. How many moles of calcium carbonate would be necessary to react with 8 moles of HCl?
1 2 3 4 5

3. Balance the following equation (find what number coefficient X is): NH_{3 (g)} + O_{2 (g)} --> NO _(g) + XH₂O _(g).
2 3 4 5 6

4. The formation of ammonia is shown by the following reaction: N_{2 (g)} + 3H_{2 (g)}--> 2NH_{3 (g)}. You are given 13.85 grams of nitrogen and 5.27 grams of hydrogen. If the experiment produced 3.297 grams of ammonia, then what is the percent yield?
25% 50% 35.80% 76.60% None of these

5. How many moles in 20 g of water?
1.11 20 18 1.1 42

6. How many kilometers are in 10.00 miles? (1 inch equals exactly 2.54 centimeters)
2.04 km 4.09 km 8.09 km 16.09 km None of these

7. On a faraway planet, the following system of measurement is used: 1 zorg = 5.81 zaks 1 zak = .87 zips 1 zip = 2.52 zeeks 1 zeek = 10.02 yaks 1 yak = 3.91 zaps How many zorgs are in 3.20 zaps?
5.81 12.53 2.74 0.00641 None of these

8. Substance X has a mass of 36.08 grams. Calculations show that .199 moles of substance X exist. What element is most likely X?
Molybdenum Technetium Ruthenium Rhodium Palladium

9. How many carbon molecules are present in 5.0 grams of glucose? (C₆H₁₂O₆)
1.0 * 10^22 5.1 * 10^22 1.0 * 10^23 6 None

10. When 2 moles of propane (C₃H₈, MW = 44 grams) is combusted with oxygen gas, how many grams of CO₂ (MW: 44 grams) are produced?
88 44 3 132 264

11. If 11 grams in a reaction was obtained, and you had a theoretical yield of 14 grams, what is your % yield?
0.79% 79% 11% 14% 12%

12. How many grams is 0.25 moles of table salt (NaCl?)
58.44 grams 14.61 grams 14.6 grams 58 grams 15 grams

13. When aluminum reacts with sulfuric acid, the result is aluminum sulfate and hydrogen gas. How many moles of sulfuric acid (H₂SO₄) will react with 24 moles of aluminum?
12 14 16 18 20

14. Ferric chloride can be made by the reaction of iron with chlorine gas. How much mass, in grams, is needed to completely react with 24.0 g chlorine gas?
12.59 24.0 48.0 12.6 48.01

15. There are 2.34 moles of substance A₃ combined with 2.77 moles of substance B. Assume that the reaction goes to completion. After the reaction is complete, AB is reacted with substance C₂. The reaction creates CB and A. If C₂ was in excess during the second reaction, then how many moles of CB were produced?
2.43 moles 3.82 moles 4.38 moles 7.02 moles None of these

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