Question

1. What is the mass of 15 atoms of carbon?

a) 1.249 amu

b) 1.249 grams

c) 0.8007 amu

d) 0.8007 grama

e) 180.2 amu

f) 180.2 grams

2) How many atoms are in 0.125 mol of sodium?

a) 4.818 x 10^24 atoms

b) 2.076 x 10^-25 atoms

c) 7.53 x 10^22 atoms

3. How many atoms of carbon are in 0.345 mol of carbon?

a) 2.08 x 10^23 atoms

b) 0.0287 atoms

c) 4.14 atoms

d) 11.7 atoms

e) 5.729 x 10^-25