1. What is Moles from Volume Calculator?

Definition: This calculator determines the amount of substance (in moles) based on the volume of gas and the molar volume.

Purpose: It helps chemistry students and professionals quickly convert between volume and moles for gas calculations.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( n \) — Amount of substance (moles)
• \( V \) — Volume of gas (dm³)
• \( V_m \) — Molar volume (dm³/mol)

Explanation: The gas volume is divided by the molar volume to determine the number of moles of gas present.

3. Importance of Moles Calculation

Details: Moles are fundamental in stoichiometry for chemical reactions, allowing precise measurement of reactants and products.

4. Using the Calculator

Tips: Enter the gas volume in dm³ and molar volume (default 22.4 dm³/mol for ideal gases at STP). All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What is molar volume?
A: Molar volume is the volume occupied by one mole of a substance (gas) at a given temperature and pressure.

Q2: Why is 22.4 dm³/mol commonly used?
A: This is the molar volume of an ideal gas at standard temperature and pressure (STP: 0°C and 1 atm).

Q3: When should I use a different molar volume?
A: Use different values for non-STP conditions or real gases. For room temperature (25°C), use ~24.0 dm³/mol.

Q4: Can this be used for liquids or solids?
A: No, this calculation is specifically for gases. For liquids/solids, you'd need density and molar mass.

Q5: How precise is this calculation?
A: It's exact for ideal gases under specified conditions. Real gases may show slight deviations.