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An evacuated glass vessel weighs `50.0 g` when empty, `148.0 g` when filled with a liquid of density `0.98 g mL^(-1)`, and `50.5 g` when filled with an ideal gas at `760 mm Hg` at `300 K`. Determine the molar mass of the gas. |
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Answer» Mass of ideal gas `=50.5-50=0.5 g` Mass of liquid `=148-50=98 g` `Volume=(Mass)/(Density)=(98)/(0.98)=100 mL` or `0.1 L` For the gas, `PV=(w)/(M)RT` or `(760)/(760)xx0.1=(0.5)/(M)xx0.0821xx300` or `M=123.15` |
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