1. What is the Volume and Moles Equation?

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

Purpose: It's essential for chemistry calculations, particularly in gas laws and stoichiometry problems.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

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

Explanation: The volume of a gas is directly proportional to the number of moles when temperature and pressure are constant.

3. Importance of Volume-Mole Calculations

Details: These calculations are fundamental in chemical reactions, gas measurements, and industrial processes where precise volume measurements are needed.

4. Using the Calculator

Tips: Enter the amount of substance in moles and the molar volume (default 22.4 dm³/mol for STP). All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What is standard molar volume?
A: At STP (0°C and 1 atm), 1 mole of any ideal gas occupies 22.4 dm³ (22.4 L).

Q2: Does this work for all gases?
A: Yes, for ideal gases. Real gases may show slight deviations under certain conditions.

Q3: How does temperature affect molar volume?
A: Molar volume increases with temperature (Charles's Law). Use 24.8 dm³/mol at 25°C and 1 atm.

Q4: Can I use this for solutions?
A: No, this is specifically for gases. For solutions, use concentration-volume relationships.

Q5: What units should I use?
A: The calculator uses dm³ (1 dm³ = 1 liter) for volume and moles for amount of substance.