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1. If 16 grams of O2 react with excess C2H6, how many grams of CO2 will be formed? The formula mass of O2 = 32 amu and the formula mass of CO2 = 44 amu. The balanced chemical equation is...
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| (a) | 22 grams |
| (b) | 13 grams |
| (c) | 9 grams |
| (d) | 7 grams |
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| 2. If 64 grams of O2 react with 45 grams of C2H6, how many grams of CO2 will be formed? The formula mass of O2 = 32 amu, C2H6 = 30 and the formula mass of CO2 = 44 amu. The balanced chemical equation is given in the previous problem. |
| (a) | 132 grams |
| (b) | 66 grams |
| (c) | 50 grams |
| (d) | 44 grams |
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| 3. How many milliliters of 2 M NaCl solution are required to make 1 liter of 0.4 M NaCl solution? |
| (a) | 5,000 mL |
| (b) | 800 mL |
| (c) | 200 mL |
| (d) | 0.2 mL |
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4. If an air bag in a car needs 44.8 L of gas when filled, how many grams of NaN3 are needed to fill the bag with nitrogen gas at standard temperature and pressure? Remember that one mole of any gas will occupy 22.4 L at STP. The balanced chemical is...
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| (a) | 56 grams |
| (b) | 87 grams |
| (c) | 130 grams |
| (d) | 1.3 grams |
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| 5. How many grams of NaOH are needed to make 100 milliliters of a 0.2 molar solution of NaOH? |
| (a) | 0.02 grams |
| (b) | 0.8 grams |
| (c) | 20 grams |
| (d) | 800 grams |
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6. How many grams of NaHCO3 (baking soda) would you need to neutralize 500 mL of battery acid (H2SO4) that has been spilled on your garage floor? Assume that the concentration of the battery acid is 12 molar. The balanced chemical equation is...
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| (a) | 1,008,000 grams |
| (b) | 1,008 grams |
| (c) | 504 grams |
| (d) | 252 grams |
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| 7. When 157.0 grams of CaSO4 are dissolved in enough water to yield a volume of 7.25x102 milliliters of solution. The molarity of this solution will be... |
| (a) | 0.0016 M |
| (b) | 0.837 M |
| (c) | 1.15 M |
| (d) | 1.59 M |
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8. How many grams of carbon are needed to completely react with 75.2 g of SiO2? The balanced chemical equation is...
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| (a) | 3.76 g |
| (b) | 15.1 g |
| (c) | 36.0 g |
| (d) | 45.1 g |
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9. How many milliliters of 4.00 M NaOH must be added to 100.0 mL of 0.2000 M H2SO4 solution to completely neutralize the acid? The balanced chemical equation is...
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| (a) | 0.04 mL |
| (b) | 5.0 mL |
| (c) | 10.0 mL |
| (d) | 500 mL |
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| 10. In an acid-base titration, 42.90 mL of 0.825 M H2SO4 was required to neutralize 75.0 mL of NaOH solution. What is the molarity of the NaOH solution? The balanced chemical equation is given in the previous problem. |
| (a) | 0.0009 M |
| (b) | 0.071 M |
| (c) | 0.472 M |
| (d) | 0.944 M |
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11. If you react 1.00 L of ethane at STP with 3.00 L of oxygen at STP, how many grams of carbon dioxide will be formed? One mole of any gas occupies 22.4 L at STP. The balanced chemical equation is...
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| (a) | 1.96 g |
| (b) | 3.37 g |
| (c) | 3.93 g |
| (d) | 5.89 g |
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12. What is the percent yield of water if 0.90 g of water is obtained when 29.0 g of butane is burned in excess oxygen? The balanced chemical equation is...
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| (a) | 0.02% |
| (b) | 2% |
| (c) | 10% |
| (d) | 36% |
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13. One of the functions of the catalytic converter in your car is to oxidize carbon monoxide to carbon dioxide. If 15.0 g of carbon monoxide reacts with 9.0 g of oxygen, how many grams of which compound remains unreacted? The balanced chemical equation is...
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| (a) | 0.4 g of oxygen remains unreacted |
| (b) | 0.8 g of carbon monoxide remains unreacted |
| (c) | 7.1 g of carbon monoxide remains unreacted |
| (d) | 8.1 g of oxygen remains unreacted |
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