1. What is Molar Mass?

The molar mass of a substance is the mass in grams of one mole of that substance. For CH4 (methane), it's the sum of the atomic masses of one carbon atom and four hydrogen atoms.

2. How to Calculate Molar Mass of CH4

The calculation uses the formula:

Where:

• \( C \) — Atomic mass of carbon (typically 12.011 g/mol)
• \( H \) — Atomic mass of hydrogen (typically 1.008 g/mol)

Explanation: The formula accounts for 1 carbon atom and 4 hydrogen atoms in each methane molecule.

3. Importance of Molar Mass

Details: Molar mass is essential for converting between grams and moles in chemical calculations, determining stoichiometry in reactions, and calculating solution concentrations.

4. Using the Calculator

Tips: Enter the atomic masses of carbon and hydrogen. Default values are provided based on standard atomic weights. All values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: Why are the default values 12.011 and 1.008?
A: These are the standard atomic weights of carbon and hydrogen based on the natural abundance of their isotopes.

Q2: What is the molar mass of methane in kg/mol?
A: Simply divide the result in g/mol by 1000 (e.g., 16.042 g/mol = 0.016042 kg/mol).

Q3: Does this account for different isotopes?
A: The standard atomic weights already account for natural isotopic abundance. For specific isotopes, use their exact masses.

Q4: How accurate is this calculation?
A: It's as accurate as the atomic mass values you input. For most purposes, 4 decimal places is sufficient.

Q5: Can I calculate molar mass for other compounds this way?
A: Yes, the same principle applies - sum the atomic masses of all atoms in the molecule.