How do you convert grams to moles and moles to grams?

To convert grams to moles and moles to grams, you'll need to use the molar mass of the substance. The molar mass is the mass of one mole of a substance and is expressed in grams per mole (g/mol). Here's how you can perform the conversions:

Converting grams to moles:
To convert grams to moles, you'll use the formula:
Number of moles = Mass (in grams) / Molar mass (in g/mol)

Let's say you have 60 grams of a substance, and you want to find out how many moles it represents. First, you need to know the molar mass of the substance. For example, if the molar mass is 30 g/mol, the calculation would be:

Number of moles = 60 grams / 30 g/mol = 2 moles

So, 60 grams of the substance would be equivalent to 2 moles.

Converting moles to grams:
To convert moles to grams, you'll use the formula:
Mass (in grams) = Number of moles x Molar mass (in g/mol)

For example, if you have 3 moles of a substance with a molar mass of 20 g/mol, the calculation would be:

Mass (in grams) = 3 moles x 20 g/mol = 60 grams

So, 3 moles of the substance would be equivalent to 60 grams.

It's essential to know the molar mass of the substance you're working with. You can find the molar mass of an element by looking at the periodic table (the atomic mass listed for each element) or calculating it for a compound by summing up the atomic masses of all the atoms in its chemical formula.