A and DCorrect E.
Answer:A and DQuestion 101 out of 1 pointsA 0.850-mole sample of nitrous oxide, a gas used as an anesthetic by dentists, has a volume of 20.46 L at 123 °C and 1.35 atm. What would be its volume at 468°C and 1.35 atm?Selected Answer:d. 38.3 LCorrect Answer:d. 38.3 LQuestion 111 out of 1 pointsSuppose that 6.02 mol of hydrogen gas occupies a 82.9 L steel tank. At what temperature in °Cwill the pressure in the tank be 681 torr?(Enter your answer with one decimal place. Do not type the units.)Selected Answer:-122.7Correct Answer:-122.7 ± 1%Question 121 out of 1 pointsWhat volume of carbon dioxide, measured at 25 °C and 741 torr, can be obtained by the reaction of 50.0 g of CaCO3with 750 mL of 2.00M HCl solution?CaCO3(s) + HCl(aq) => CaCl2(aq) + CO2(g) + H2O(l) (unbalanced)Selected Answer:b. 12.5 LCorrect Answer:b. 12.5 LQuestion 131 out of 1 pointsA sample of 3.564 g of an ideal gas occupies 0.2500 L at STP. What is the molar mass of the gas?Selected Answer:b.
3.19x102Correct Answer:b. 3.19x102Question 140 out of 1 pointsA gas mixture, with a total pressure of 300. torr, consists of equal massesof Ne and Ar. What is the partial pressure of Ne, in torr? Hint:What is the mole fraction of Ne?Selected Answer:c. 100Correct Answer:e. 200Question 150 out of 1 pointsA gas is found to diffuse at half the rate of methane (CH4). Which of the following could be this gas?
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- Spring '08
- Thermodynamics, Calcium carbonate