bantuin dong Gw bingung

a) S = 1 x 2 molekul = 2 atom
O = 3 x 2 = 6 atom
b) C = 2 x 5 molekul = 10
H = 3 + 1 =4 x 5 = 20
O = 2 x 5 = 10
dan seterusnyaaa