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In a hydrocarbon, mass ratio of hydrogen and carbon is 1:3, the empirical formula of hydrocarbon is
  • a)
    CH
  • b)
    CH₂
  • c)
    C₂H
  • d)
    CH₄
Correct answer is option 'D'. Can you explain this answer?
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Most Upvoted Answer
In a hydrocarbon, mass ratio of hydrogen and carbon is 1:3, the empiri...
Explanation:

  • The mass ratio of hydrogen and carbon is 1:3 in the given hydrocarbon.

  • This means that for every 1 gram of hydrogen, there are 3 grams of carbon in the hydrocarbon.

  • Let's assume that we have 100 grams of the hydrocarbon.

  • Out of these 100 grams, the mass of hydrogen would be 25 grams (1/4th of 100) and the mass of carbon would be 75 grams (3/4th of 100).

  • Now, we need to find the empirical formula of the hydrocarbon.

  • The empirical formula gives the simplest whole number ratio of atoms present in a compound.

  • To find the empirical formula, we need to find the ratio of atoms in the given hydrocarbon.

  • For this, we need to find the number of moles of hydrogen and carbon in the hydrocarbon.

  • The number of moles of hydrogen can be found using its mass and molar mass.

  • The molar mass of hydrogen is 1 g/mol.

  • Therefore, the number of moles of hydrogen in the hydrocarbon is 25/1 = 25.

  • The number of moles of carbon can be found using its mass and molar mass.

  • The molar mass of carbon is 12 g/mol.

  • Therefore, the number of moles of carbon in the hydrocarbon is 75/12 = 6.25.

  • Now, we need to find the ratio of atoms by dividing the number of moles by the smallest number of moles.

  • The smallest number of moles is 6.25, so we divide the number of moles of hydrogen and carbon by 6.25.

  • Number of moles of hydrogen = 25/6.25 = 4

  • Number of moles of carbon = 6.25/6.25 = 1

  • Therefore, the ratio of hydrogen to carbon in the given hydrocarbon is 4:1.

  • The empirical formula of the hydrocarbon can be written as CH4 since the ratio of hydrogen to carbon is 4:1.

  • Therefore, the correct answer is option D (CH).

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In a hydrocarbon, mass ratio of hydrogen and carbon is 1:3, the empiri...
In the question H:C mass ratio is 1:3 and in methane there are 4 H and one carbon so the mass ratio is 4:12 ie,1:3
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In a hydrocarbon, mass ratio of hydrogen and carbon is 1:3, the empirical formula of hydrocarbon isa)CHb)CH₂c)C₂Hd)CH₄Correct answer is option 'D'. Can you explain this answer?
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