15. Balance the following equations: (a) Ag(s) + H, S(g) + O2(g) — Ag, S(s) + H2O(1)
(b) Pa(s) + O2(g) – P4010(s)
(c) Pb(s) + H2O(l) + O2(g) Pb(OH),(s)
(d) Fe(s) + H2O(1) Fe, 04(s) + H2(g)

Which of the following is true for the actual yield of a reaction? it is always calculated as a ratio. it is the yield from the excess reactant. it is the yield from the limiting reactant. it is always less than the theoretical yield.

Which statement explains why the bonds between non metals tend to be covalent? the bonds are found to be nondirectional they have large differences in electronegativity they have small differences in electronegativity they have ions that produce an electrostatic pull

What is the mass of phosphorous in a 51-kg person