Write the overall cell reaction for the galvanic cell given below. pt(s) h2(g) h+(aq) cl2(g) cl-(aq) pt(s) a) pt(s) + h2(g) + cl-(aq) → pt(s) + 2 h+(aq) + 2 cl2(g) b) 2 h+(aq) + 2 cl2(g) → 2 hcl(aq) c) h2(g) + cl2(g) → 2 h+(aq) + 2 cl-(aq) d) no reaction would occur because there is no salt bridge. c