**Mole Calculator**

## Conversion Between Mass, Moles and Molecular Weight

The conversion between these three units is where the mole calculator comes in handy – it’s simple, accurate, and easy to use!

Just enter your desired substance and its molecular weight into the fields below, hit calculate, and voila! You’ll get an instant **online class help** answer for how many moles there are in a given unit volume.

**What is a mole?**

Moles are a unit of measurement that gives scientists the ability to measure and calculate mathematical quantities in chemistry. It is defined as an amount equal to Avogadro’s number, or approximately six grams per mole. These units allow chemists to express values for conversion between many different metrics related to molecules – like mass, moles, and molecular weight.

Molecules are counted in grams so that the weights will be shown as a number with units of grams per mole – this makes it easier to compare between different substances and determine how many molecules are present at various levels of concentration.

**How to calculate the moles of an element?**

A mole can be calculated by dividing the mass of an element in grams by its molecular weight. For example, to calculate how many moles are present when there is 100g of sodium chloride (NaCl), divide this number with the molecular weight for NaCl which is 58.44g / mol:mole = 100 g/ 58.44 g/mol = 0.178 mol.

** Example of how to use the mole calculator.**

– You have 150g of oxygen gas and want to find out how many moles are present. Enter the mass in grams (150) into the calculator, and then press “mole” – this will give you 0.018, which is about 18 mol ents per mole or 180 liters per mole at standard temperature-pressure (STP).

– You have 100g of mercury and want to find out how many moles are present. Enter the mass in grams (100) into the calculator, and then press “mole” – this will give you 0.065, which is about 65 mol ents per mole or 650 liters per mole at STP.

**Benefits of using the mole calculator**

– Easily convert between different units of measure (i.e., grams, kilograms, and tonnes)

– Calculate the number of moles from a known mass or molecular weight without having to calculate using an equation

– Make calculations for reactions easier by understanding what quantities are being used in chemical equations

– Standard temperature pressure is used in the calculations to make them universal

When entering your data in the calculator, you will see a list of all possible units for conversion. You may:

– enter numbers with decimals (e.g., 0.065) or without decimal places (e.g., 65),

– use commas to separate digits when typing out large numbers (e.g., 123,456),

– use the constants on your calculator to convert unit measurements (e.g., 65°C in Celsius).

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