Refer to the activity series chart and determine which of the following displacement reactions can occur.
a.
2ag(s) + zn(no3)2(aq) → 2agno3(aq) + zn(s)
b.
2cu(no3)2(aq) + 2ag(s) → 2agno3(aq) + cu(s)
c.
cuso4(aq) + fe(s) → feso4(aq) + cu(s)
d.
3mgso4(aq) + 2al(s) → al2(so4)3(aq) + 3mg(s)

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:

increased stability in the completion of fluorine's outer shell.

the ratio of the conjugate base to the acid required to attain the desired ph.