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Manipal MET2014ChemistrySome Basic Concepts of Chemistry

For the reaction represented by the equation, CX ₄+2 O ₂ CO ₂+2 X ₂ O 9.0 g of CX ₄ completely reacts with 1.74 g of oxygen. The approximate molar mass of X will be

Options

  1. A20
  2. B40
  3. C60
  4. D80

Correct answer

D. 80

Step-by-step solution

aligned & CX ₄+2 O ₂ CO ₂+2 X ₂ O & 1 ~mol 2 ~mol =2 32 ~g . & 9.0 ~g 1.74 ~g . aligned 1.74 ~g O ₂ reacts with CX ₄=9.0 ~g 64 ~g O ₂ will react with CX ₄= 9.0 64 1.74 =331 Molecular mass of CX ₄=331 or aligned 331 & =12+4 X X & = 331-12 4 =79.8 80 aligned

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