p. 181, #13-17

13.
a. 6 moles of NH3 are needed to react with 9 mol PbO
b. 5 moles of N2 are produced by the reaction of 10 mol NH3
c. 5 moles of Pb are produced from 5 mol PbO

14.
a. 17 moles of N2 can be produced from 34g of NH3
b. 621g of Pb can be produced from the complete reaction of 3.0 mol PbO
**c. 17g of N2 can be produced from 34.0 g NH3
d. 415 g of PbO will produce  415 g Pb

15. It is not 67% because two oxygen atoms are 32g and a carbon atom is 12g. You would do the equation 32/32 + 12 x 100% which equals 73%.

16.
a. 87% silver
b. 53% aluminum
c. 40% calcium

17.
a. 68% lead
b. 50% PbSO4
c.10% lead
d. see paper