1. What is the Mole Scale?

The mole scale (Avogadro scale) is fundamental in chemistry for quantifying amounts of chemical substances. One mole contains exactly 6.02214076×10²³ elementary entities (Avogadro's number).

2. How Does the Calculator Work?

The calculator uses the basic mole formula:

Where:

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

Explanation: The formula converts mass of a substance to number of moles using its molecular weight as the conversion factor.

3. Importance of Mole Calculations

Details: Mole calculations are essential for stoichiometry in chemical reactions, solution preparation, and determining reaction yields. They bridge the gap between the microscopic (molecular) and macroscopic (measurable) worlds.

4. Using the Calculator

Tips: Enter the 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 (atoms, molecules, etc.) in one mole of a substance.

Q2: How do I find molecular weight?
A: Sum the atomic weights of all atoms in the molecule. Atomic weights are found on the periodic table.

Q3: Can I use this for elements and compounds?
A: Yes, this works for both elements (use atomic weight) and compounds (use molecular/formula weight).

Q4: What if my substance is in kilograms?
A: Convert to grams first (1 kg = 1000 g) before using the calculator.

Q5: How precise should my molecular weight be?
A: Use at least 2 decimal places for most purposes. For very precise work, use more decimal places or IUPAC atomic weights.