1. How many hydrogen atoms are in 5 molecules of isopropyl alcohol, C3H7O

a. 5 x (6.02 x 10^23)
b. 5
c. 35
d. 35 x (6.02 x 10^23)

2. How many molecules are in 2.10 mol CO2?

a. 2.53 x 10^24 molecules
b. 3.79 x 10^24 molecules
c. 3.49 x 10^-24 molecules
d. 1.26 x 10^24 molecules

3. What is the molar mass of AuCl3?

a. 96 g
b. 130 g
c. 232.5 g
d. 303.6 g