1. What is the Mole Formula?

The mole formula (n = m/MW) relates the amount of substance (in moles) to its mass and molecular weight. It's a fundamental calculation in chemistry for quantifying chemical substances.

2. How Does the Calculator Work?

The calculator uses the mole formula:

Where:

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

Explanation: This formula converts between mass and number of particles (via moles) using the molecular weight as a conversion factor.

3. Importance of Mole Calculation

Details: Mole calculations are essential for stoichiometry in chemical reactions, preparing solutions with specific concentrations, and determining reaction yields.

4. Using the Calculator

Tips: Enter mass in grams and molecular weight in g/mol. Both values must be positive numbers. Molecular weight can be calculated by summing atomic weights of all atoms in the molecule.

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 exactly 6.02214076×10²³ particles (Avogadro's number).

Q2: How do I find molecular weight?
A: Sum the atomic weights of all atoms in the molecule. For example, water (H₂O) has MW = 2(1.008) + 15.999 = 18.015 g/mol.

Q3: Can I use this for elements and compounds?
A: Yes, the formula works for both elements and compounds as long as you use the correct molecular/atomic weight.

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

Q5: When would I need to calculate moles?
A: Common uses include preparing solutions, balancing chemical equations, calculating reaction yields, and determining limiting reagents.