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How to Calculate Moles in Plain English


Moles are a crucial concept in chemistry. They are used to measure the number of atoms or molecules in a substance. Calculating moles may seem challenging at first, but with a little practice, it can become an easy task. In this article, we will explain how to calculate moles in plain English.

What Are Moles?

Before we dive into calculating moles, let's first understand what moles are. A mole is a unit of measurement that represents the amount of a substance. One mole is equal to 6.022 x 10^23 particles, which is also known as Avogadro's number.

Calculating Moles

Calculating moles involves using the formula: Moles = Mass ÷ Molar mass The mass is the amount of substance in grams, and the molar mass is the mass of one mole of the substance.

Example Calculation

Suppose you have 10 grams of sodium chloride (NaCl). The molar mass of NaCl is 58.44 g/mol. To calculate the number of moles in 10 grams of NaCl, we can use the formula: Moles = Mass ÷ Molar mass Moles = 10 g ÷ 58.44 g/mol Moles = 0.171 moles Therefore, 10 grams of NaCl is equal to 0.171 moles.

Frequently Asked Questions

Question Answer
What is the formula for calculating moles? Moles = Mass ÷ Molar mass
What is the molar mass? The molar mass is the mass of one mole of a substance.
What is Avogadro's number? Avogadro's number is 6.022 x 10^23 particles per mole.


In conclusion, calculating moles is a straightforward process. All you need is the mass of the substance and the molar mass. Using the formula Moles = Mass ÷ Molar mass, you can easily calculate the number of moles in a substance. With a little practice, calculating moles will become second nature to you. Good luck with your chemistry studies! Don't forget to check out our other interesting articles.

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