1. What is the Mole Concept?

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

2. How Does the Calculator Work?

The calculator uses the basic mole formula:

Where:

• \( n \) — Amount of substance in moles (mol)
• \( mass \) — Mass of the substance in grams (g)
• \( molar\ mass \) — Molar mass of the substance in grams per mole (g/mol)

Explanation: The formula relates the mass of a substance to the number of particles it contains through its molar mass.

3. Importance of Mole Calculation

Details: Mole calculations are fundamental in stoichiometry for chemical reactions, solution preparation, and gas law calculations. They bridge the macroscopic and microscopic worlds in chemistry.

4. Using the Calculator

Tips: Enter the mass in grams and the molar mass in g/mol. Both values must be positive numbers. The molar mass can be found on the periodic table for elements or calculated for compounds.

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between moles and molarity?
A: Moles measure amount of substance, while molarity (M) measures concentration (moles per liter of solution).

Q2: How do I find molar mass?
A: For elements, use the atomic mass from the periodic table. For compounds, sum the atomic masses of all atoms in the formula.

Q3: Why is Avogadro's number important?
A: It provides the connection between the atomic scale (individual particles) and measurable quantities (grams).

Q4: Can I calculate moles from volume?
A: For gases at STP, you can use 22.4 L/mol. For solutions, you need both volume and molarity.

Q5: What's the significance of mole in chemical equations?
A: Coefficients in balanced equations represent mole ratios between reactants and products.