Question
At STP, $0.280 \mathrm{L}$ of a gas weighs $0.400 \mathrm{g}$. Calculate the molar mass of the gas.
Step 1
280 \mathrm{L}$, the mass (m) as $0.400 \mathrm{g}$, the temperature (T) as $273 \mathrm{K}$ (since it's at STP), and the pressure (P) as $1 \mathrm{atm}$. We are asked to find the molar mass (M). Show more…
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