
Matias P. answered 02/26/20
MIT,Stanford, UPenn Tutor for Math,Science,Eng,Languages
To answer this question let's look at the individual elements in this compound.
3 Carbon
6 Hydrogen
let's look at the atomic mass in the periodic table or can also look for this numbers online
Carbon: 12.0107
Hydrogen: 1.00784
Now let's multiply the number of each element by its respective weight and add them all together to get the total weight of one mole of our compound.
(3 x 12.0107) + (6 x 1.00784) = 42.07914 grams per mole.
Since we have 0.27 moles we multiply our weight by 0.27.
0.27 x 42.07914 = 11.36g of compound in 0.27 moles.

J.R. S.
02/26/20