7-5-1. When the following chemical equation is balanced, what is the ratio of the coefficients of NO and Cu(NO3)2?
Cu(s) + HNO3(aq) ==> NO(g) + Cu(NO3)2(aq) + H2O(l)
A. 1:1, B. 1:2, C. 2:1, D. 2:3, E. 3:2
7-5-2. When the following chemical equation is balanced, what is the ratio of the coefficients of MnCl2 and Cl2?
KMnO4 (s) + HCl (aq) ==> MnCl2(aq) + Cl2(g) + KCl(aq) + H2O(l)
A. 1:2, B. 2:3, C. 2:4, D. 1:5, E. 2:5
