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How many moles of CO\(_2\) are produced when ethanol is burnt with 6g of oxygen

Chemistry
JAMB 2024

How many moles of CO\(_2\) are produced when ethanol is burnt with 6g of oxygen

  • A. 0.125
  • B. 0.250
  • C. 0.375
  • D. 0.750
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Correct Answer: Option A
Explanation

First, write a balanced chemical equation of the reaction:

         C\(_2\)H\(_5\)OH  +  3 O\(_2\)  → 2 CO\(_2\) + 3H\(_2\)O

                                3moles     :     2 moles

       Using  n = \(\frac{mass}{Molar mass}\), \(\frac{6}{32}\)          :  x mole

                                      0.1875 mole :  x mole

By simple proportion, X = \(\frac{0.1875  X   2}{3}\)

                                   X = 0.125 mole

There is an explanation video available below.


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Explanation Video

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