Question

Which of the following compounds have the same empirical formula?

Answer 1

The empirical formula of a chemical compound is the simplest positive integer ratio of atoms present in a compound. Therefore, the correct answer from the choices is the last option. C7H14 and C10H20  have the same empirical formula which is CH2. Hope this answers the question.

Answer 2

Answer: The compounds having same empirical formula are $C_7H_{14}\text{ and }C_{10}H_{20}$

Explanation:

Empirical formula is defined as the formula in which atoms in a compound are present in simplest whole number ratios. The atoms in the compounds must be same.

For the given options:

• Option A:  $NO\text{ and }NO_2$

Empirical formula of NO = NO

Empirical formula of $NO_2=NO_2$

Thus, they do not have the same empirical formula

• Option B:  $C_4H_{10}\text{ and }C_{10}H_4$

Empirical formula of $C_4H_{10}=C_2H_5$

Empirical formula of $C_{10}H_4=C_5H_2$

Thus, they do not have the same empirical formula

• Option C:  $CO_2\text{ and }SO_2$

Empirical formula of $CO_2=CO_2$

Empirical formula of $SO_2=SO_2$

Thus, they do not have the same empirical formula

• Option D:  $C_6H_{12}\text{ and }C_{6}H_{14}$

Empirical formula of $C_6H_{12}=CH_2$

Empirical formula of $C_{6}H_{14}=C_3H_7$

Thus, they do not have the same empirical formula

• Option E:  $C_7H_{14}\text{ and }C_{10}H_{20}$

Empirical formula of $C_7H_{14}=CH_2$

Empirical formula of $C_{10}H_{20}=CH_2$

Thus, they have the same empirical formula

Hence, the compounds having same empirical formula are $C_7H_{14}\text{ and }C_{10}H_{20}$