Question

The empirical formula of glucose is CH20 which has a formula mass of 30 amu. if the molecular
mass of glucose is 180 amu. Determine the molecular formula of glucose.

Answer 1

Answer on Question #53760 - Chemistry – Inorganic Chemistry

Question

The empirical formula of glucose is $\mathrm{CH}_2\mathrm{O}$ which has a formula mass of 30 amu. If the molecular mass of glucose is 180 amu. Determine the molecular formula of glucose.

Answer:

We can say that empirical formula of glucose is $\mathrm{CH}_2\mathrm{O}$, or $\mathrm{C_nH_{2n}O_n}$.

Find out a coefficient by dividing molar mass of glucose by mass of its empirical formula:

$$n = 180 / 30 = 6$$

So, the molecular formula of glucose is: $\mathrm{C_6H_{12}O_6}$.

Answer: $\mathrm{C_6H_{12}O_6}$

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