1. What is a Mole of Carbon-12?

A mole is the amount of substance that contains as many elementary entities (atoms, molecules, ions) as there are atoms in exactly 12 grams of Carbon-12. This number is Avogadro's number (6.022 × 10²³).

2. How Does the Calculator Work?

The calculator uses the simple formula:

Where:

• \( n \) — Amount of substance in moles
• \( mass \) — Mass of Carbon-12 sample in grams
• 12 — Molar mass of Carbon-12 (g/mol)

Explanation: Since Carbon-12 is defined as having exactly 12 g/mol, the calculation is straightforward.

3. Importance of Mole Calculation

Details: The mole concept is fundamental in chemistry for quantitative analysis, stoichiometric calculations, and understanding chemical reactions at the molecular level.

4. Using the Calculator

Tips: Enter the mass of your Carbon-12 sample in grams. The mass must be a positive number.

5. Frequently Asked Questions (FAQ)

Q1: Why is Carbon-12 used as the standard?
A: Carbon-12 was chosen as the standard because it's a pure, stable isotope that's easy to work with and provides consistent results.

Q2: How many atoms are in one mole?
A: One mole contains exactly 6.02214076 × 10²³ elementary entities (Avogadro's number).

Q3: Can this calculator be used for other elements?
A: No, this specific calculator is only for Carbon-12. Other elements require their respective molar masses.

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: How precise is this calculation?
A: For Carbon-12, it's exact by definition. The precision depends on your mass measurement accuracy.