Question

22.(a) Write the chemical formulae of the following.
(i) Sodium oxide
(iii) Sodium sulphide
(ii) Aluminium chloride
(iv) Magnesium hydroxide


(b) What is the mass of:
(a) 0.2 mole of oxygen atoms?
(b) 0.5 mole of water molecules​

Answer 1

1. sodium oxide - Na2o
2. sodium sulphite- Na2s
3. aluminium chloride- alcl3
4. magnesium oxide- mg0
5. magnesium hydroxide-mg(OH)

Answer 2

Answer:

(1)Na20

(3)Na2s

(2)AICI3

(4)Mg(OH)2

(a)16×0.2=3.2g

(b)18×0.5=9g10

hope it helps!