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)

in cartography, a contour line (often just called a "contour") joins points of equal elevation (height) above a given level, such as mean sea level. a contour map is a map illustrated with contour lines, for example a topographic map, which thus shows valleys and hills, and the steepness or gentleness of slopes.

explanation:

2b2t

explanation:

2b2t