Answer :
Given:
- V=0.280 L.
- Mass of the gas=0.400g.
- Temperature=273K
- PV=nRT
- n=PV/RT
=1*0.280 L/0.0821*273
=0.0124moles.
- Molar mass of the gas=Mass of the gas/n
=0.400/0.0124=32.26g
Therefore, molar mass of the gas is approximately 32.26g.
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