Problem: A scientist measures the speed of sound in a monatomic gas to be 449 m/s at 20°C.What is the molar mass of this gas?

FREE Expert Solution

For an ideal gas, speed of sound is given as:

v=γRTM

Solve for M:

M=γRTv2

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Problem Details

A scientist measures the speed of sound in a monatomic gas to be 449 m/s at 20°C.

What is the molar mass of this gas?

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What scientific concept do you need to know in order to solve this problem?

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