1. What is Mole Calculation?

The mole is the SI unit for amount of substance. One mole contains exactly 6.02214076×10²³ elementary entities (atoms, molecules, ions, or electrons). This calculator helps convert between mass and moles using molecular weight.

2. How Does the Calculator Work?

The calculator uses the basic mole formula:

Where:

• \( n \) — Amount of substance in moles
• \( mass \) — Mass of the substance in grams
• \( MW \) — Molecular weight in grams per mole

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

3. Importance of Mole Calculation

Details: Mole calculations are fundamental in chemistry for stoichiometric calculations, preparing solutions, and analyzing chemical reactions. They allow chemists to work with measurable quantities of substances at the atomic/molecular scale.

4. Using the Calculator

Tips: Enter the mass of your substance in grams and its molecular weight in g/mol. For carbon-12, the default MW is set to 12.01 g/mol. All values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between mole and molecule?
A: A mole is a quantity (6.022×10²³ entities), while a molecule is a single particle of a substance.

Q2: Why is carbon-12 used as a reference?
A: Carbon-12 is used as the standard for atomic weights because it's a stable isotope with a well-defined mass.

Q3: How accurate is this calculation?
A: The calculation is mathematically precise, but accuracy depends on the precision of your mass measurement and the correctness of the molecular weight.

Q4: Can I use this for compounds as well as elements?
A: Yes, the same formula works for any chemical species as long as you use the correct molecular weight.

Q5: What's Avogadro's number?
A: Avogadro's number (6.022×10²³) is the number of particles in one mole of a substance.