Question

(a) CH4 +O2 CO2 + H2 O
(b) Na2 O +H2 O NaOH
(d) Na +H2 O NaOH + H2

Answer 1

ANSWER:-

(A) 2CH4 + O2 -----> CO2 + 2H2O

(B) Na2O + H2O -----> 2NaOH

(C) 2Na + 2H2O -----> 2NaOH + H2

Now all your equations are balanced...