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Problem 75 Easy Difficulty

How does the molecular formula of a compound differ from the empirical formula? Can a compound's
empirical and molecular formulas be the same? Explain.

Answer

Molecular formula: $\mathrm{CH}_{4} \mathrm{O}$
Empirical formula: $\mathrm{CH}_{4} \mathrm{O}$

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Top Chemistry 101 Educators
TD
Theodore D.

Carleton College

Stephanie C.

University of Central Florida

Lizabeth T.

Numerade Educator

Jake R.

University of Toronto

Video Transcript

Okay. What is the difference between empirical formula and molecular formula? So empirical formula is the way we write a chemical formula for, um, a compound. And we represent the Adams using the smallest ratio of them. Instead of using the actual amount of Adams to write, write the chemical formula, we used the smallest ratio when we used the actual amount that is known as a molecular formula. So here is the actual number of Adam's being represented in the chemical formula. Okay, so Thies to molecular formula and empirical formula can be different. The they're not always the same. For instance, let's look it ch two Oh, also known as from all the height we have for everyone carbon and oxygen, we have to hundreds If we multiply each Adam by six re gets C 12 06 Also in his glucose, the blood sugar molecule. These two molecules have the same empirical formula but different molecular formula and are also then different compounds hears from all the hut and here is glucose, but also they can be the same. For instance, in the case of ch 40 also known as methanol, here we have the smallest ratio of Adams in the chemical formula, and this is also them looking the empirical formula and the actual number off Adams.

McMaster University
Top Chemistry 101 Educators
TD
Theodore D.

Carleton College

Stephanie C.

University of Central Florida

Lizabeth T.

Numerade Educator

Jake R.

University of Toronto