1. What is the Mole Calculation?

The mole calculation is a fundamental concept in chemistry that relates the mass of a substance to the number of particles it contains. One mole contains exactly 6.022 × 10²³ elementary entities (Avogadro's number).

2. How Does the Calculator Work?

The calculator uses the mole formula:

Where:

• Mass — The mass of the substance in grams (g)
• Atomic Mass (Ar) — The relative atomic mass in grams per mole (g/mol)

Explanation: This formula calculates the number of moles by dividing the given mass by the atomic or molecular mass of the substance.

3. Importance of Mole Calculation

Details: Mole calculations are essential for quantitative chemistry, allowing chemists to measure amounts of substances, balance chemical equations, and calculate reaction yields.

4. Using the Calculator

Tips: Enter the mass in grams and the atomic/molecular mass in g/mol. Both values must be positive numbers greater than zero.

5. Frequently Asked Questions (FAQ)

Q1: What is a mole in chemistry?
A: A mole is the SI unit for amount of substance, defined as containing exactly 6.02214076 × 10²³ elementary entities.

Q2: How is atomic mass related to moles?
A: The atomic mass (in g/mol) represents the mass of one mole of atoms of that element.

Q3: Can this calculator be used for compounds?
A: Yes, use the molecular mass (Mr) instead of atomic mass (Ar) for compounds.

Q4: What is Avogadro's constant?
A: Avogadro's constant (6.022 × 10²³ mol⁻¹) is the number of particles in one mole of any substance.

Q5: Why are mole calculations important in GCSE chemistry?
A: Mole calculations are fundamental to understanding chemical quantities, reaction stoichiometry, and are essential for many GCSE chemistry topics.