Using very little soap while washing clothes, does not serve the purpose of cleaning of clothes, because

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$2.0 \mathrm{g}$ of ${\mathrm{H}}_{2 }\mathrm{gas}$ is adsorbed on $2.5 \mathrm{g}$ of platinum powder at $300 \mathrm{K}$ and $1$ bar pressure. The volume of the gas adsorbed per gram of the adsorbent is $\mathrm{mL}$

(Given : $\mathrm{R}=0.083 \mathrm{L}$ bar ${\mathrm{K}}^{-1}{ \mathrm{mol}}^{-1}$)

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If the initial pressure of a gas is $0.03 \mathrm{atm}$, the mass of the gas adsorbed per gram of the adsorbent is____$\times {10}^{-2} \mathrm{g}$

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