Regents Chemistry Exam June 2024 Question 34

34 Which formula is the empirical formula for ethane, C2H6?

(1) CH (3) C2H6

(2) CH3 (4) C4H12

**Solution: **

*Empirical formula is a formula where elements are in their simplest whole number ratios. Our formula is C**2**H**6**. Can 2 and 6 be divided further? Yes, they can both be divided by 2, getting C**1**H**3** or CH**3**. Choice 2 is the correct answer choice. *

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