Stoichiometry - Jamb Chemistry Past Questions and Answers

Question 106:

• JAMB 2015

What is the volume of energy required to burn 45cm\(^3\) of mixture at S.T.P

A. 135.0cm³
B. 150.0cm³
C. 45.0cm³
D. 90.0cm³

Question 107:

• JAMB 2015

Calculate the relative molecular mass of Limestone CaCO3, (Ca = 40, C =12, O = 16)

A. 56
B. 100
C. 76
D. 90

Question 108:

• JAMB 2016

What is the concentration of a solution containing 2g of NaOH in 100cm³ of solution?
[Na=23, O=16, H=1]

A. 0.05 moldm^-3
B. 0.30 moldm^-3
C. 0.50 moldm^-3
D. 0.40 moldm^-3

Question 109:

• JAMB 2016

Calculate the volume in cm³ of oxygen evolved at s.t.p when a current of 5A is passed through acidified water for 193s?
[F = 96500 C mol¹. Molar volume of a gas at s.t.p = 22.4dm³]

A. 0.056dm³
B. 0.224dm³
C. 224.000dm³
D. 56.000dm³

Question 110:

• JAMB 2017

Calculate the amount in moles of a gas which occupies 10.5 dm³ at 6 atm and 30^oC [R = 082 atm dm³ K^-1 mol^-1]

A. 2.536
B. 1.623
C. 4.736
D. 0.394