Stoichiometry - Jamb Chemistry Past Questions and Answers

Question 56:

• JAMB 1993

At 25^oC and 1atm, a gas occupies a volume of 1.50dm³. What volume will it occupy at 100^oC and 1atm?

A. 1.88 dm³
B. 6.00 dm³
C. 18.80 dm³
D. 18.80 dm³
E. 60.00dm³

Question 57:

• JAMB 1994

At the same temperature and pressure, 50 cm³ of nitrogen gas contains the same number of molecules as?

A. 25 cm³ of methane
B. 40 cm³ of hydrogen
C. 50 cm³ of ammonia
D. 100 cm³ of chlorine

Question 58:

• JAMB 1994

8g CH₄ occupies 11.2 dm³ at s.t.p. What volume would 22 g of CH₃CH₃ occupy under the same condition?
(C = 12, H = 1)

A. 3.7 dm³
B. 11.2 dm³
C. 22.4 dm³
D. 33.6 dm³

Question 59:

• JAMB 1994

What volume of oxygen measured at s.t.p would be liberated on electrolysis by 9650 coulombs of electricity?
(Molar volume of gas = 22.4 dm³, F = 96,500 C mol^-)

A. 22.4 dm³
B. 11.2 dm³
C. 1.12 dm³
D. 0.560 dm³

Question 60:

• JAMB 1994

One mole of a hydrocarbon contains 48 g of carbon. If it vapour density is 28, the hydrocarbon is?

A. An alkane
B. An alkene
C. An alkyne
D. Aromatic (C = 12, H = 1)