Grams to Moles Calculator – Convert Mass to Moles Instantly

Q: How do I convert grams to moles?

To convert grams to moles, divide the mass in grams by the molar mass of the substance (in g/mol). This calculator automates that process using your inputs.

Q: What is the difference between molar mass and molecular weight?

Molecular weight is the mass of one molecule, measured in atomic mass units (amu). It tells you how heavy a single molecule is compared to a tiny standard unit. Molar mass is the mass of one mole (6.02 × 10²³ molecules) of a substance, measured in grams per mole (g/mol). It tells you how many grams that huge group of molecules weighs.

Q: Atomic and Molar Mass, are they the same?

No, atomic mass and molar mass are not the same , but they have the same numerical value with different units and meanings.

Q: What is the difference between Molar Mass and Avogadro’s number?

Molar mass is the weight of one mole of a substance, measured in grams per mole (g/mol). Avogadro’s number (6.02 × 10²³) is the number of atoms or molecules in one mole.

Enter mass: Select unit: Choose a substance or enter molar mass:

Formula: Moles = mass (g) ÷ molar mass (g/mol)

Creator

Mounir Roukky

Page Contents

With our Grams to Moles calculator, you can easily and accurately convert the mass of a substance in grams to the number of moles, using the substance’s molar mass. This is a key tool in chemistry for determining the amount of substance in reactions.

How to use our Grams to Moles Calculator

To convert grams to moles with our calculator, follow these easy steps:

Enter the mass of the substance in grams in the first field.
Enter the molar mass of the substance in grams per mole (g/mol) in the second field.
Click the ‘Calculate’ button to see the number of moles.
The result will display with two decimal places.

G to Mole conversion formula explained:

$$ \text{Moles} = \frac{\text{mass (grams)}}{\text{molar mass (g/mol)}} $$

The ‘mass’ is the weight of your substance in grams, and the ‘molar mass’ is the mass of one mole of that substance in grams per mole (g/mol). Dividing these gives you the number of moles. If you don’t know it, our molecular weight calculator can help.

How to Convert Grams to Moles

Let’s say you have a certain amount of a substance in grams, and you want to know how many moles it is.

To convert g to mol, you need two things:

The mass in grams (how much you have).
The molar mass (how heavy one mole of that substance is, in grams per mole).

Let’s do an example with water (H₂O):

Step 1: Find the molar mass of water.

Water has 2 hydrogen atoms and 1 oxygen atom.
Hydrogen weighs about 1 gram per mole.
Oxygen weighs about 16 grams per mole.
So, molar mass of water = (2×1)+16=18 grams per mole.

Step 2: Say you have 36 grams of water.
Now use the formula:

$$ \text{moles} = \frac{36}{18} = 2 $$

So, 36 grams of water equals 2 moles.

That means you have 2 big groups of water molecules! It’s like saying: if one apple weighs 180 grams, then 360 grams means you have 2 apples.

Here, “apple” is a mole, and “180 grams” is the molar mass. Just divide the grams you have by the molar mass, and you get moles!

Conclusion

Converting grams to moles is a basic skill in chemistry that helps you measure a substance’s amount in a way that’s connected to chemical reactions. To better understand this concept, see our guide on what is a mole in chemistry. Whether you’re working on homework or preparing a lab solution, understanding this conversion makes it easier to work with molecules and atoms.

Having a grams to moles calculator makes the process simpler, providing quick and accurate results. Now that you know how it works, you can confidently convert between grams and moles whenever you need to. Once you’ve found the number of moles, you can also calculate solution concentration with our molarity calculator.

Frequently Asked Questions About Grams to moles

How do I convert grams to moles?

To convert grams to moles, divide the mass in grams by the molar mass of the substance (in g/mol). This calculator automates that process using your inputs.

What is the molar mass?

Molar mass is how much one mole of a substance weighs in gram. The molar mass tells you how many grams that big group (one mole) of a substance weighs.

What is the difference between molar mass and molecular weight?

Molecular weight is the mass of one molecule, measured in atomic mass units (amu). It tells you how heavy a single molecule is compared to a tiny standard unit. Molar mass is the mass of one mole (6.02 × 10²³ molecules) of a substance, measured in grams per mole (g/mol). It tells you how many grams that huge group of molecules weighs.

Atomic and Molar Mass, are they the same?

No, atomic mass and molar mass are not the same, but they have the same numerical value with different units and meanings.

What is the difference between Molar Mass and Avogadro’s number?

Molar mass is the weight of one mole of a substance, measured in grams per mole (g/mol). Avogadro’s number (6.02 × 10²³) is the number of atoms or molecules in one mole.

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