1. What is Molar Mass?

Molar mass is the mass of one mole of a substance, typically expressed in grams per mole (g/mol). For compounds, it's the sum of the atomic masses of all atoms in the chemical formula.

2. How to Calculate Molar Mass

The molar mass of Ca₃(PO₄)₂ is calculated as:

Where:

• Ca — Calcium (atomic mass ~40.078 g/mol)
• P — Phosphorus (atomic mass ~30.974 g/mol)
• O — Oxygen (atomic mass ~15.999 g/mol)

Explanation: The formula Ca₃(PO₄)₂ contains 3 calcium atoms, 2 phosphorus atoms, and 8 oxygen atoms (2 phosphate groups × 4 oxygen each).

3. About Calcium Phosphate

Details: Calcium phosphate (Ca₃(PO₄)₂) is a white crystalline solid found in bones and teeth. It's used in fertilizers, food additives, and dental products.

4. Using the Calculator

Tips: The calculator uses standard atomic masses by default. You can input different atomic mass values if needed (e.g., for isotopes).

5. Frequently Asked Questions (FAQ)

Q1: Why is the molar mass important?
A: Molar mass is essential for stoichiometric calculations, converting between grams and moles, and preparing chemical solutions.

Q2: What's the difference between formula mass and molar mass?
A: For ionic compounds like Ca₃(PO₄)₂, we use "formula mass" instead of "molecular mass," but the calculation is the same.

Q3: How accurate are the default atomic mass values?
A: The values are IUPAC standard atomic weights. For precise work, use isotope-specific masses.

Q4: Why does the formula have parentheses?
A: The (PO₄)₂ indicates two phosphate groups, each containing 1 phosphorus and 4 oxygen atoms.

Q5: What are common uses of calcium phosphate?
A: It's used in fertilizers, food additives (E341), dental products, and as a calcium supplement.