Some Basic Concepts of Chemistry - Result Question 68

####6. The percentage composition of carbon by mole in methane is (2019 Main, 8 April II)

(a) 75

(b) 20

(c) 25

(d) 80

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Solution:

  1. Key Idea The percentage composition of a compound is given by the formula.

composition =[ Composition of a substance in a compound / Total composition total of compound ]×100

In CH4,

mole of carbon =1

mole of hydrogen =4

of carbon by mole in CH4=11+4×100=20



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