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AP EAMCET2001ChemistrySome Basic Concepts of Chemistry

How many litres of oxygen (at STP) are required for complete combustion of 39 ~g of liquid benzene? (Atomic weights: C =12, O =16, H =1 )

Options

  1. A84
  2. B22.4
  3. C42
  4. D11.2

Correct answer

A. 84

Step-by-step solution

array r C ₆ H ₆+7 1 2 O ₂ 6 CO ₂+3 H ₂ O 78 ~g 7.5 22.4 ~L array Volume of O ₂ required for 78 ~g of C ₆ H ₆=7.5 22.4 ~L Volume of O ₂ required for 39 ~g of C ₆ H ₄= 7.5 22.4 39 78 =84 I .

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