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1. At 18°C and 102.0 kPa, 1.29 L of a gas weighs 2.71 g. Calculate the approximate molar mass of the gas.

1. At 18°C and 102.0 kPa, 1.29 L of a gas weighs 2.71 g. Calculate the approximate molar mass of the gas.

Chemistry
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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+ ou add to the document will 1. At 18°C and 102.0 kPa, 1.29 L of a gas weighs 2.71 g. Calculate the approximate molar mass of the gas. 2. Determine the volume occupied by 4.00 g of oxygen gas at STP. 3. What volume would 15.0 g of argon occupy at 90°C and 735 mm of mercury? 4. Compute the approximate density of methane CH4, at 20°C and 5.00 atm. 5. If the density of carbon monoxide is 3.17 g/L at -20°C and 238 kPa, what is its approximate molar mass? 6. If 200 mL of a gas weighs 0.268 g at STP what is its molar mass? 7. Compute the volume of 11.0 g of nitrous oxide, N₂O, at STP. 8. What volume will 1.216 g of SO, gas occupy at 18°C and 100.6 kPa? 9. Compute the mass of one litre of ammonia gas at STP. 10. Determine the density of H₂S gas at 27°C and 2.00 atm. 11. A 1.225 g mass of volatile liquid is vapourized giving 400 mL of vapour when measured over water at 30°C and 102.6 kPa. The vapour pressure of water at 30°C is 4.27 kPa. What is the molar mass of the liquid. 12. Find the molar mass of a gas whose density at 40°C and 104.6 kPa is 1.286 g/L. 13. What mass of hydrogen as STP could be contained in a vessel which holds 4.00 g of oxygen at STP? 14. One of the methods for estimating temperature of the centre of the sun is based on the ideal gas law. If the centre is assumed to consist of gases whose average molar mass is 2.00 g/mol and if the density and the pressure are 1.40 g/mL and 1.31 x 10¹¹ kPa respectively calculate the temperature of the centre of the sun. 15. Find the density of gaseous Br, at 25°C and 102.0 kPa. 16. A mass of 0.350 g of a volatile substance is converted into a vapour. The displaced air occupies 65.8 mL when measured over water at 40°C and a total pressure of 99.7 kPa. What is the approximate molar mass of the substance? At 40°C the vapour pressure of water is 7.33 kPa.
Transcribed Image Text:+ ou add to the document will 1. At 18°C and 102.0 kPa, 1.29 L of a gas weighs 2.71 g. Calculate the approximate molar mass of the gas. 2. Determine the volume occupied by 4.00 g of oxygen gas at STP. 3. What volume would 15.0 g of argon occupy at 90°C and 735 mm of mercury? 4. Compute the approximate density of methane CH4, at 20°C and 5.00 atm. 5. If the density of carbon monoxide is 3.17 g/L at -20°C and 238 kPa, what is its approximate molar mass? 6. If 200 mL of a gas weighs 0.268 g at STP what is its molar mass? 7. Compute the volume of 11.0 g of nitrous oxide, N₂O, at STP. 8. What volume will 1.216 g of SO, gas occupy at 18°C and 100.6 kPa? 9. Compute the mass of one litre of ammonia gas at STP. 10. Determine the density of H₂S gas at 27°C and 2.00 atm. 11. A 1.225 g mass of volatile liquid is vapourized giving 400 mL of vapour when measured over water at 30°C and 102.6 kPa. The vapour pressure of water at 30°C is 4.27 kPa. What is the molar mass of the liquid. 12. Find the molar mass of a gas whose density at 40°C and 104.6 kPa is 1.286 g/L. 13. What mass of hydrogen as STP could be contained in a vessel which holds 4.00 g of oxygen at STP? 14. One of the methods for estimating temperature of the centre of the sun is based on the ideal gas law. If the centre is assumed to consist of gases whose average molar mass is 2.00 g/mol and if the density and the pressure are 1.40 g/mL and 1.31 x 10¹¹ kPa respectively calculate the temperature of the centre of the sun. 15. Find the density of gaseous Br, at 25°C and 102.0 kPa. 16. A mass of 0.350 g of a volatile substance is converted into a vapour. The displaced air occupies 65.8 mL when measured over water at 40°C and a total pressure of 99.7 kPa. What is the approximate molar mass of the substance? At 40°C the vapour pressure of water is 7.33 kPa.
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