1. What is the Volume Formula from Moles?

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: Essential for chemistry calculations involving gases at standard temperature and pressure (STP) or other conditions.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( V \) — Volume of gas (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 Molar Volume Calculation

Details: Accurate volume calculations are crucial for stoichiometric calculations, gas law applications, and laboratory preparations.

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: When would molar volume be different?
A: Molar volume changes with temperature and pressure according to the ideal gas law (PV = nRT).

Q3: How does this relate to Avogadro's Law?
A: The formula directly applies Avogadro's Law which states equal volumes of gases at the same T and P contain equal numbers of molecules.

Q4: Can this be used for liquids or solids?
A: No, molar volume varies significantly for condensed phases. This formula is primarily for gases.

Q5: How to find moles if I know volume?
A: Rearrange the formula: \( n = \frac{V}{V_m} \)