1. Exactly 500 mL of a gaseous compound at 70.0 cm of Hg and a temperature of 270C has a mass of 1.85 grams. Determine the molecular weight of a gas. a.104 g/mol b.86 g/mol  c.108 g/mol  d. 99 g/mol 2. A mixture of gases in a 20-L, vessel contains 15 g of CO2 ang 6 grams of CH4 at a temperature of 280C. Determine the partial pressure of each gas present at the total pressure of gas mixture in the vessel.  a. 0.668 atm  b. 0.894 atm  c. 0.782 atm  d. 0.883 atm 3. What volume will be occupied by 33.0 grams of CO2 at 706 torr and 270C? a. 20.7L b. 19.9L c. 20.3L d. 21.2L

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Chapter1: Chemical Foundations
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1. Exactly 500 mL of a gaseous compound at 70.0 cm of Hg and a temperature of 270C has a mass of 1.85 grams. Determine the molecular weight of a gas. a.104 g/mol b.86 g/mol  c.108 g/mol  d. 99 g/mol 2. A mixture of gases in a 20-L, vessel contains 15 g of CO2 ang 6 grams of CH4 at a temperature of 280C. Determine the partial pressure of each gas present at the total pressure of gas mixture in the vessel.  a. 0.668 atm  b. 0.894 atm  c. 0.782 atm  d. 0.883 atm 3. What volume will be occupied by 33.0 grams of CO2 at 706 torr and 270C? a. 20.7L b. 19.9L c. 20.3L d. 21.2L
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