Question #a5af9

2 Answers
Dec 15, 2016

Simply multiply the "molar volume" by the amount in "moles".

Explanation:

"Molar volume "xx" molar quantity"

=82.4*mL*cancel(mol^-1)xx250xx10^-3*cancel(mol)~=20*mL

And when we do the problem dimensionally in this manner we automatically get an answer in mL as required.

Dec 15, 2016

Amount of liquid octane =250mmol=250xx10^-3mol

Volume this octane

="no of mole"xx"molar volume"

=250xx10^-3molxx82.4"ml"/"mol"

=20.6ml