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28 votes
The empirical formula of a chemical substance is CH₂. The

molar mass of a molecule of the substance is 56.108 g/mol.
What is the molecular formula of the chemical substance?

User Le Moi
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1 Answer

17 votes
17 votes

Answer:

Step-by-step explanation:

Remark

CH2 provides the basic structure of the hydrocarbon. It will be multiplied by some factor determined by the number of grams / mol. I will use rounded numbers because all periodic tables are slightly different.

Theoretical mass of CH2

1 C = 1 * 12 = 12

2 H= 2 * 1 = 2

Mass CH2 = 14

The multiplier for CH2

56.108 rounded = 56

Multiplier = molar mass (rounded)/Mass CH2

Multiplier = 56/14 = 4

Chemical

(CH2)_4 = C4H8

Answer: C4H8

User Elclanrs
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