+ou add to the document will1. At 18°C and 102.0 kPa, 1.29 L of a gas weighs 2.71 g. Calculate the approximate molar mass ofthe 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 approximatemolar 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 overwater at 30°C and 102.6 kPa. The vapour pressure of water at 30°C is 4.27 kPa. What is themolar 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 atSTP?14. One of the methods for estimating temperature of the centre of the sun is based on the idealgas law. If the centre is assumed to consist of gases whose average molar mass is 2.00 g/moland if the density and the pressure are 1.40 g/mL and 1.31 x 10¹¹ kPa respectively calculate thetemperature 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 occupies65.8 mL when measured over water at 40°C and a total pressure of 99.7 kPa. What is theapproximate molar mass of the substance? At 40°C the vapour pressure of water is 7.33 kPa.

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Answered: 1. At 18°C and 102.0 kPa, 1.29 L of a…

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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.

Chemistry

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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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Concept explainers

Mole Concept

Mole concept is a method to determine the amount of any substance that consists of some elemental particles using a grouping unit called ‘mole’. The mole concept enables one to handle the large amount of small elementary particles. The mole concept can be used in many calculations related to mole calculation, molar amount, mole ratio, and so on, which are significant in chemistry.

Question

+
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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