Chemical combination - Jamb Chemistry Past Questions and Answers

Question 151:

• JAMB 2021

A solution contains 20g of solute in 180g of solvent. If the solvent is water, what is the concentration of the solution in terms of mass by mass percentage

A. 11.%
B. 22.2%
C. 10%
D. 20%

Question 152:

• JAMB 2021

220g of carbon dioxide contains ----- moles

A. 5
B. 6
C. 3
D. 4

Question 153:

• JAMB 2021

Oxygen is absent in?

A. Kerosene
B. Soil
C. Glass
D. Cement