# Quick Answer: How do I move from grams to moles?

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## Why do we convert grams to moles?

In chemistry, we base our conversions on the balanced chemical equation, but it is solely based on number. … Big, because atoms and molecules are way too small to count, so we mass large numbers of them instead, and use molar mass to convert to the NUMBER of moles of them.

## How do you convert to moles?

To convert from moles to atoms, multiply the molar amount by Avogadro’s number. To convert from atoms to moles, divide the atom amount by Avogadro’s number (or multiply by its reciprocal).

## What is moles to grams?

The amount of grams in a mole depends on the substance you have. To work it out, find the atomic or molecular mass of your substance and multiply it by the number of moles you have. For one mole, the atomic or molecular mass will be the same as the weight.

## How do you do Stoich?

Almost all stoichiometric problems can be solved in just four simple steps:

1. Balance the equation.
2. Convert units of a given substance to moles.
3. Using the mole ratio, calculate the moles of substance yielded by the reaction.
4. Convert moles of wanted substance to desired units.

## How do you convert grams to moles of an unknown substance?

There are three steps to converting grams of a substance to moles.

1. Determine how many grams are given in the problem.
2. Calculate the molar mass of the substance.
3. Divide step one by step two.
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