You have to find the gram formula mass of C6H6 then do mass (g) = mol x GFM
B is your best answer because a mixture is when two or more things combine but not chemically. Take soup for example you take out all the pieces because they didn't combine together and just become 1 thing they still have parts. You can still take the noodles, you take the fish or meat out still, you take the broth away to.
Hetero means different. Examples could be heterogenous (different in form) or heterozygous (having two different forms of a gene).
