Question

8.What is the mass of 4.56 moles of sulfur dioxide?
9.What is the mass of 4.56 molecules of sulfur dioxide?
10.How many formula units are in 0.456 grams of Ca3(PO4)2?
11.How many moles are in 1.5 x 10 ^23 atoms of fluorine?
12.What is the mass of 2.80 x 10 ^23 molecules of CO2?

Answer 1

8. moles = grams/molar mass. Solve for grams.

9. There are 6.022E23 molecules in a mole; therefore, 4.56 molecules = (4.56/6.022E23) = # moles SO2. Follow 9 to determine mass.

You should be able to do the others now.

Answer 2

34.52