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
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