9.60 g of a gas X occupies the same volume at 0.30 g of h...
9.60 g of a gas X occupies the same volume at 0.30 g of hydrogen under the same conditions. Calculate the molar mass of X [H = 1]
8g mol -1
16 gmol -1
32g mol -1
64g mol -1
Correct answer is C
Using the ideal gas equation,
PV = nRT.
where n=massmolar mass.
For Hydrogen, mHMH=PVRT.
For element X, mXMX=PVRT
Under the same conditions implies PVRT is the same for both hydrogen and X.
mHMH=mXMX
Molar mass of X = molar mass of hydrogen×mass of Xmass of hydrogen
= 1×9.60.3
= 32 g/mol
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