Arrange the following in order of increasing mass:

Question

1. one F atom
2. 1x10^-20 mol of F
3. 1x10^-20g of F
4. one F2 molecule

A. 1<2<3<4
B. 1<4<3<2
C. 3<1<2<4
D. 2<1<3<4
E. none of these

I'm thinking C

Answer 1

1. 3x10^-23g
2. 2x10^-19g
3. 1x10^-20g
4. 6x10^-23g
I got B.