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2. Without using the value of So, predict the sign for
a) 2K(s) + F2(g) 2KF(g)
b) NaClO3(s) → Nat(aq) + CIO3(aq)
c) 2NO(g) + O2(g) + 2NO2(g)
d) H2S(g) + O2(g) Sc(s) + H2O(g)​