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Ideal Gas Equation

Radius of A...

Question

Radius of $A r$ atom is $145$ pm. The percentage volume occupied by an $A r$ atom at STP is:

A

0.03

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B

3.0

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C

0.30

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D

0.006

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Solution

The correct option is B $3.0$
Volume percentage of argon $= R = 145$ pm
Volume of 1 atom= $\frac{4}{3} π r^{3} = 3.10 \times 10^{- 22} {c m}^{3}$
Percentage volume occupied by an argon atom at STP $= 3$

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