Unit 2: Section C Summary: 13-17

                 

13.  3 PbO(s) + 2 NH3(g) à 3 Pb(s) + N2(g) + 3 H2O(l)

a.    6 moles NH3

b.    5 mol N2

c.    5 mol Pb

14. 3 PbO(s) + 2 NH3(g) à 3 Pb(s) + N2(g) + 3 H2O(l)

a.    1 mol N2

b.    621 g Pb

c.    28 g N2

d.    447 g PbO

15. ?

16. Percent by mass:

a.    93% Ag

b.    53% Al

c.    40% Ca

17. A 50.0-g sample of ore contains 5.00 g lead (II) sulfatee, PbSO4:

a.    68% Pb in lead sulfate

b.    9% lead (II) sulfate in ore

c.    6% lead in the ore.

d.    On paper