A sample of oxygen gas collected at a pressure of 955 mmHg and a temperature of 281 K has a mass of 18.6 grams.The volume of the sample isL. 0.761 mol sample of methane gas at a temperature of 14.0°C is found to occupy a volume of 29.9 liters. The pressureof this gas sample ismm Hg.

Answered: A sample of oxygen gas collected at a…

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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Question

A sample of oxygen gas collected at a pressure of 955 mm
Hg and a temperature of 281 K has a mass of 18.6 grams.
The volume of the sample is
L.

0.761 mol sample of methane gas at a temperature of 14.0
°C is found to occupy a volume of 29.9 liters. The pressure
of this gas sample is
mm Hg.

Expert Solution

Step 1: Ideal Gas Law

Since you have asked multiple questions, we will solve the first question for you. If you want any specific question to be solved then please specify the question number or post only that question

According to ideal gas law:

$P V = n R T$ ................ (1)

where, P, V, n, R, and T stand for pressure, volume, number of mol, gas constant, and temperature (in the Kelvin scale) respectively.

Step 2: Number of Moles of Oxygen

The molar mass (MM) of oxygen gas (O₂) is 32.00 g/mol.

So, the number of mol (n) of O₂ present in 18.6 g of mass (M) is calculated as shown below:

$n = \frac{M}{M M} = \frac{18.6 g}{32.00 g / m o l} = 0.581 m o l$

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