Question

Preciso pra hoje, me ajudem pfv

Answer 1

3.

a) 3 NiBr2: 3×(1+2)=9

b) 2 Mg(NO3)2: 2×(1+2×(1+3))=18

c) 1 BaSO4: 1×(1+1+4)=6

4.

(B)

(D)

(A)

(C)