Answer:
392 grams
Step-by-step explanation:
Begin by finding the molar mass. You do this by adding the atomic mass of each element in the compound.
So, add 4(12)+8(1)=56 grams C4H8
Next, set up an equation.
We start with 7 moles of C4H8, and we want to convert moles to grams. We will use the molar mass for that.
So 7mol C4H8/1 x 56grams C4H8 per/1 mole C4H8= 392 grams of C4H8 per seven moles of C4H8