?Balance each chemical equation.(a) \(\mathrm{Na}_{2} \mathrm{~S}(a

Chapter 7, Problem 47

(choose chapter or problem)

Balance each chemical equation.

(a) \(\mathrm{Na}_{2} \mathrm{~S}(a q)+\mathrm{Cu}\left(\mathrm{NO}_{3}\right)_{2}(a q) \longrightarrow \mathrm{NaNO}_{3}(a q)+\mathrm{CuS}(s)\)

(b) \(\mathrm{HCl}(a q)+\mathrm{O}_{2}(g) \longrightarrow \mathrm{H}_{2} \mathrm{O}(l)+\mathrm{Cl}_{2}(g)\)

(c) \(\mathrm{H}_{2}(g)+\mathrm{O}_{2}(g) \longrightarrow \mathrm{H}_{2} \mathrm{O}(l)\)

(d) \(\mathrm{FeS}(s)+\mathrm{HCl}(a q) \longrightarrow \mathrm{FeCl}_{2}(a q)+\mathrm{H}_{2} \mathrm{~S}(g)\)

Text Transcription:

Na_2S(aq) + Cu(NO_3)_2(aq) ¡ NaNO_3(aq) + CuS(s)

HCl(aq) + O_2( g) ¡ H2O(l) + Cl_2( g)

H_2( g) + O_2( g) ¡ H_2O(l)

FeS(s) + HCl(aq) ¡ FeCl_2(aq) + H_2S(g)