# What is the mass in grams of 5.90 mol C_8H_18?

Mar 6, 2016

The molar mass of $\text{C"_8"H"_18=8*12+18*1="114g mol"^(-1)}$
So the mass of $\text{5.90 mole C"_8"H"_18}$ will be:
5.90cancel("mol C"_8"H"_18)xx(114"g C"_8"H"_18)/(1cancel("mol C"_8"H"_18))="673 g C"_8"H"_18" rounded to three significant figures