Adapted by Nelson Nuñez-Rodriguez
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By David W. Ball
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| QUESTION | ANSWER |
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1. What is the ideal gas law? What is the significance of R? |
1. The ideal gas law is PV = nRT. R is the ideal gas law constant, which relates the other four variables. |
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3. A sample of gas has a volume of 3.91 L, a temperature of 305 K, and a pressure of 2.09 atm. How many moles of gas are present? |
3. 0.327 mol |
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5. A 0.0555 mol sample of Kr has a temperature of 188°C and a volume of 0.577 L. What pressure does it have? |
5. 3.64 atm |
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7. A sample of 7.55 g of He has a volume of 5,520 mL and a temperature of 123°C. What is its pressure in torr? |
7. 8,440 torr |
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9. A sample of Ne has a pressure of 0.772 atm and a volume of 18.95 L. If its temperature is 295 K, what mass is present in the sample? |
9. 12.2 g |
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11. Oxygen is a product of the decomposition of mercury(II) oxide: 2HgO(s) → 2Hg(ℓ) + O2(g) What volume of O2 is formed from the decomposition of 3.009 g of HgO if the gas has a pressure of 744 torr and a temperature of 122°C? |
11. 0.230 L |
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13. What is the volume of 17.88 mol of Ar at STP? |
13. 401 L |
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15. How many liters, at STP, of CO2 are produced from 100.0 g of C8H18, the approximate formula of gasoline? 2C8H18(ℓ) + 25O2(g) → 16CO2(g) + 18H2O(ℓ) |
15. 157 L |
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17. What is the density of each gas at STP?
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17.
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19. What is the density of SF6 at 335 K and 788 torr? |
19. 5.51 g/L |