Question

Calculate the number of moles
a. 52g of He
b. 20g of water
c. 22g of carbon di oxide

Answer 1

Explanation:

a)n = m/M

n = 52/4 = 13

b)n = m/M

M = H2 + O

1×2 + 16

18

n = 20/18

= 1.11

c)n = m/M

M= C + O2

12 + 16×2

12 + 32

44

n= 22/44

= 1/2 =0.5