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Principles of General Chemistry | 2nd Edition | ISBN: 9780073511085 | Authors: Martin S. Silberberg
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Calculate the molar mass of a gas at 388 torr and 45°C if

Chapter 6, Problem 35P

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QUESTION: Problem 35P

Calculate the molar mass of a gas at 388 torr and 45°C if 206 ng occupies 0.206 µL.

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QUESTION: Problem 35P

Calculate the molar mass of a gas at 388 torr and 45°C if 206 ng occupies 0.206 µL.

ANSWER:

Solution 35P

Here, we have to calculate the molar mass of gas.

Step 1 of 2

According to the Avogadro’s law the density of a gas is directly proportional to its molar mass .

According to the Charles law the density of gas inversely proportional to the temperature.

Let’s write the formula for ideal gas density formula:

  =

Rearrange the formula is as follows.

M =d

 = Ideal gas density in kg/L.

M= Molar mass of gas

P = Pressure of the gas

R = Gas constant

T = Absolute temperature in K.

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