Grams to Moles Calculator

How to Calculate Grams to Moles Conversion

The conversion between grams and moles is a fundamental concept in chemistry that relates the mass of a substance to the amount of that substance. This calculator helps you convert between grams and moles using the molar mass of the compound or element.

What is the Formula?

The basic formulas for converting between grams and moles are:

1. Grams to Moles: $$\text{moles}=\frac{\text{mass in grams}}{\text{molar mass}}$$

2. Moles to Grams: $$\text{mass in grams}=\text{moles}\times \text{molar mass}$$

Where:

• Molar mass is the mass of one mole of the substance, expressed in grams per mole (g/mol)

What are the calculation steps?

1. Identify whether you're converting from grams to moles or vice versa.
2. Determine the molar mass of the compound or element.
3. Use the appropriate formula based on your conversion direction.
4. Plug in the known value (either mass in grams or number of moles) and the molar mass.
5. Perform the calculation to get your result.

Example Calculation

Let's convert 36.03 grams of water (H₂O) to moles:

Step 1: Identify the formula

We're converting from grams to moles, so we'll use: moles = mass in grams / molar mass

Step 2: Determine the molar mass of water

Molar mass of H₂O = 2(1.008 g/mol) + 15.999 g/mol = 18.015 g/mol

Step 3: Plug in the values

moles = 36.03 g / 18.015 g/mol

Step 4: Perform the calculation

moles = 2.000 mol

Therefore, 36.03 grams of water is equivalent to 2.000 moles.

Diagram of Grams to Moles Conversion

The following diagram illustrates the relationship between grams and moles:

This diagram shows the conversion between grams and moles. The arrow represents division by the molar mass when converting from grams to moles, and multiplication by the molar mass when converting from moles to grams.