The mole concept and Avogadro's number - Jamb Chemistry Past Questions and Answers

Question 1:

• JAMB 2019

56.00cm³ of a gas at S.T.P. weighed 0.11g. What is the vapour density of the gas?
[Molar volume of a gas at S.T.P = 22.4dm³

A. 11.00
B. 22.00
C. 33.00
D. 44.00
E. 55.00

Question 2:

• JAMB 1978

The oxidation state of chlorine in potassium chlorate is

A. +1
B. +2
C. +3
D. +5
E. +7