1. What is Moles Calculation?

The mole is the unit of measurement for amount of substance in chemistry. One mole contains exactly 6.02214076×10²³ elementary entities (Avogadro's number). This calculator helps convert between mass and moles using molecular weight.

2. How Does the Calculator Work?

The calculator uses the fundamental mole formula:

Where:

• \( n \) — Amount of substance in moles
• \( m \) — Mass in grams
• \( MW \) — Molecular weight in grams per mole (g/mol)

Explanation: The formula relates the mass of a substance to its amount in moles through its molecular weight.

3. Importance of Moles in Chemistry

Details: Moles are fundamental in stoichiometric calculations, allowing chemists to work with measurable quantities of substances at the atomic/molecular scale.

4. Using the Calculator

Tips: Enter mass in grams and molecular weight in g/mol. Both values must be positive numbers. The result will be the amount of substance in moles.

5. Frequently Asked Questions (FAQ)

Q1: What is Avogadro's number?
A: Avogadro's number (6.022×10²³) is the number of particles in one mole of a substance.

Q2: How do I find molecular weight?
A: Molecular weight is the sum of atomic weights of all atoms in a molecule, available on periodic tables.

Q3: Can I calculate mass from moles?
A: Yes, by rearranging the formula: \( m = n \times MW \).

Q4: What's the difference between moles and molarity?
A: Moles measure amount of substance, while molarity (M) measures concentration (moles per liter).

Q5: Why use moles instead of grams?
A: Moles allow direct comparison of particle numbers between different substances, essential for reaction stoichiometry.