Question

Fingernail polish is mainly acetone (C3H6O) and has a density of 0.788gcc.

A. HOW MANY GRAMS OF ACETONE ARE IN A O.5L BOTTLE

B HOW MANY MOLECULES OF ACETONE ARE IN THAT SAME BOTTLE

Answer 1

You made a typo. You meant the density is 0.789 g/cc.
A.
mass = volume x density
mass = 500 cc x 0.789 g/cc = ?

B. mols acetone = grams/molar mass
Then there are 6.02E23 molecules in one (1) mol of acetone.