JAMB Chemistry 2007 Objective — Question 3

Question 3 of 50 from the Joint Admissions and Matriculation Board (JAMB) Chemistry 2007 Objective paper, with the correct answer and a full explanation.

What is the volume of oxygen required to burn completely 45cm3 of methane at s.t.p?

A. 45.0cm3
B. 90.0cm3Correct
C. 135.0cm3
D. 180.0cm3

Explanation

CH4 + 2O2 -> CO2 + 2H2O. Volume ratio CH4:O2 = 1:2, so O2 required = 2 x 45cm3 = 90.0cm3.

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