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## How do I calculate moles?

So in order to calculate the number of moles of any substance present in the sample, we simply **divide the given weight of the substance by its molar mass**. Where ‘n’ is the number of moles, ‘m’ is the given mass and ‘M’ is the molar mass.

## How many moles is 02?

**One mole** of oxygen gas, which has the formula O_{2}, has a mass of 32 g and contains 6.02 X 10^{23} molecules of oxygen but 12.04 X 10^{23} (2 X 6.02 X 10^{23}) atoms, because each molecule of oxygen contains two oxygen atoms.

## What is mole in chemistry class 11?

A mole can be defined as **the amount of substance that contains the same number of chemical entities (atoms, ions, molecules, etc.)** as there are in 12 g of Carbon-12 isotope, as defined by the General Conference on Weights and Measures.

## How many moles are in h20?

The number of atoms is an exact number, the number of mole is an exact number; they do not affect the number of significant figures. The average mass of **one mole** of H2O is 18.02 grams. This is stated: the molar mass of water is 18.02 g/mol. Notice that the molar mass and the formula mass are numerically the same.

## How many moles are in 96g of oxygen?

Therefore, according to the question, it is given that, weight of ${O_2}$ is 96 grams and is contained in the volume of vessel 2 liters. Hence, the number of moles is **3**.

## How many moles is CH4?

(molar mass CH4 = 16.0 g/mol] G: **1.58 moles** CH4 D: ?

## How do you calculate grams to moles?

**Divide the mass of the substance in grams by its molecular weight**. This will give you the number of moles of that substance that are in the specified mass. For 12 g of water, (25 g)/(18.015 g/mol) = 0.666 moles.