Which of the following is NOT true for 1 g o | vedclass

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(B) $1$. Moles of $He = \frac{	ext{mass}}{	ext{molar mass}} = \frac{1 \ g}{4 \ g/mol} = 0.25 \ mol$ $(1/4 \ mol)$. So,option $A$ is true.$2$. Volume

Vedclass · Accepted Answer

It occupies $2.24 \ L$ volume at $STP$.

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(B) $1$. Moles of $He = \frac{	ext{mass}}{	ext{molar mass}} = \frac{1 \ g}{4 \ g/mol} = 0.25 \ mol$ $(1/4 \ mol)$. So,option $A$ is true.$2$. Volume at $STP = 	ext{moles} 	imes 22.4 \ L = 0.25 	imes 22.4 \ L = 5.6 \ L$. Thus,option $B$ is false.$3$. Rate of diffusion $r \propto \frac{1}{\sqrt{M}}$. Ratio $\frac{r_{He}}{r_{SO_2}} = \sqrt{\frac{M_{SO_2}}{M_{He}}} = \sqrt{\frac{64}{4}} = \sqrt{16} = 4$. So,option $C$ is true.$4$. Atoms in $1 \ g \ He = 0.25 	imes N_A$. Molecules in $4 \ g \ CH_4 = \frac{4}{16} 	imes N_A = 0.25 	imes N_A$. So,option $D$ is true.

Which of the following is $NOT$ true for $1 \ g$ of Helium?

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