Question

Please answer all a,b,c,d

Answer 1

sodium sulphate

Na2So4

number of atom

Na=2

s=1

o=4

quick lime

CaO

number of atom

Ca=1

O=1

Baking soda

NaHCo3

number of atom

Na=1

H=1

C=1

O=3

ammonia

Nh3

number of atom

N=1

H=3

ammonium dichromate

(NH4)2cr2o7

N=2

H=8

cr=2

o=7