1) Calculate the volume of 1.62g of Helium gas at 25.670C and 872 mmHg. (R = 0.0821 atm.L/mol.K) 2) Given the following reaction of Ca(s) in HCl(aq): Ca(s) + 2 HCl(aq) --> CaCl2(aq) + H2(g) If 32.7g of calcium solid are placed in this reaction and at the end of the experiment, hydrogen gas is produced at 25.000C and with a pressure of 790. mmHg. Calculate the volume of hydrogen gas produced. 3) An unknown gas with a mass of 1.211g occupies a volume of 677 mL. The temperature is 230C and the air pressure is 0.987 atm. Calculate the molar mass of the gas.

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Chemistry: Principles and Practice

3rd Edition

ISBN:9780534420123

Author:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer

Publisher:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer

Chapter6: The Gaseous State

Section: Chapter Questions

Problem 6.123QE

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1) Calculate the volume of 1.62g of Helium gas at 25.67⁰C and 872 mmHg.
(R = 0.0821 atm.L/mol.K)

2) Given the following reaction of Ca(s) in HCl(aq):
Ca(s) + 2 HCl(aq) --> CaCl₂(aq) + H₂(g)

If 32.7g of calcium solid are placed in this reaction and at the end of the experiment, hydrogen gas is produced at 25.00⁰C and with a pressure of 790. mmHg. Calculate the volume of hydrogen gas produced.

3) An unknown gas with a mass of 1.211g occupies a volume of 677 mL. The temperature is 23⁰C and the air pressure is 0.987 atm. Calculate the molar mass of the gas.

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