Which gas is the lightest in weight?

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(A) The weight of a gas is determined by its molar mass. $1$. The molar mass of $H_2$ (Dihydrogen) is approximately $2.016 \ g/mol$. $2$. The molar ma

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Dihydrogen

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(A) The weight of a gas is determined by its molar mass. $1$. The molar mass of $H_2$ (Dihydrogen) is approximately $2.016 \ g/mol$. $2$. The molar mass of $NH_3$ (Ammonia) is approximately $17.03 \ g/mol$. $3$. The molar mass of $SO_2$ (Sulfur dioxide) is approximately $64.06 \ g/mol$. $4$. The molar mass of $O_2$ (Dioxygen) is approximately $32.00 \ g/mol$. Since $H_2$ has the lowest molar mass among the given options,it is the lightest gas.

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