What is the balanced form of the chemical equation shown below? Zn(NO3)2(aq) + Na S(aq) → ZnS(s) + NaNO3(aq)
A. Zn(NO3)2(aq) + Na2S(aq) → ZnS(s) + 2NaNO3(aq)
B. Zn(NO3)2(aq) + Na S(aq) → ZnS(s) + NaNO3(aq)
C. ZnNO3(aq) + Nas(aq) → ZnS(s) + NaNO3(aq)
O D. 2Zn(NO3)2(aq) + Na2S(aq)
ZnS(s) + 3NaNO3(aq)

indicate valleys, hills, steepness and gentleness of slopes.

explanation:

contour lines on a map indicate elevation, or depth. numeric notations on contour lines refer to the level of elevation, or height about sea level.

"record the time to complete a chemical reaction" would most likely be part of a lab procedure.

the awnser is group 12