Chemistry: Calculate the root - mean - square speeds of helium atoms and nitrogen molecules in m/s at 25° C

A, B, B, D Protons and neutrons have the same mass as far as mass number is concerned. A proton has a postive charge, and cancels that charge by absorbing an electron....

Calculate the root - mean - square speeds of helium

Ответ:

vandarughb2875

09.04.2021

Chemistry

a) root - mean - square speeds of helium atom is 43.1 m/s

b) root - mean - square speeds of nitrogen molecule is 16.29m/s

Explanation:

The formula used for root mean square speed is:

$\nu_{rms}=\sqrt{\frac{3RT}{M}}$

where,

$\nu_{rms}$ = root mean square speed

R = gas constant = 8.314J/Kmol

T = temperature = 25^0C=(25+273)K=298K

M = atomic mass

a) root - mean - square speeds of helium atom (He)

$\nu_{rms}=\sqrt{\frac{3\times 8.314J/Kmol\times 298K}{4g/mol}}=43.1m/s$

b) root - mean - square speeds of nitrogen molecule (N_2)

$\nu_{rms}=\sqrt{\frac{3\times 8.314J/Kmol\times 298K}{28.02g/mol}}=16.29m/s$

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Calculate the root - mean - square speeds of helium atoms and nitrogen molecules in m/s at 25° C

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Calculate the root - mean - square speeds of helium atoms and nitrogen molecules in m/s at 25° C​

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Calculate the root - mean - square speeds of helium atoms and nitrogen molecules in m/s at 25° C