Given the formula of a compound:What is the molecular formula for this compound?

January 2020 NY Regents Chemistry Exam

37 Given the formula of a compound:

What is the molecular formula for this compound?
(1) CH

(2) CH2
(3) CH3

(4) C3H6

Solution: Let's count the number of carbons and hydrogens. The molecule shown has three carbons and six hydrogens.

Answer: 4

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