1. What is Molecular Mass?

Molecular mass (or molecular weight) is the sum of the atomic masses of all atoms in a molecule, measured in grams per mole (g/mol). It's a fundamental property used in chemical calculations and stoichiometry.

2. How Does the Calculator Work?

The calculator uses the molecular mass formula:

Where:

• \( MW \) — Molecular mass (g/mol)
• \( Mass \) — Mass of the substance (grams)
• \( Moles \) — Amount of substance (mol)

Explanation: This formula calculates the mass of one mole of a substance, which represents the molecular weight of that compound.

3. Importance of Molecular Mass Calculation

Details: Molecular mass is essential for stoichiometric calculations, preparing solutions with specific concentrations, determining empirical and molecular formulas, and understanding chemical reactions.

4. Using the Calculator

Tips: Enter the mass in grams and moles in mol. Both values must be positive numbers greater than zero for accurate calculation.

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between molecular mass and molar mass?
A: While often used interchangeably, molecular mass specifically refers to the mass of a molecule, while molar mass is the mass of one mole of any substance.

Q2: How is molecular mass related to Avogadro's number?
A: The molecular mass in grams contains Avogadro's number (6.022 × 10²³) of molecules of that substance.

Q3: Can this calculator be used for elements and compounds?
A: Yes, the calculation works for both elements (atomic mass) and compounds (molecular mass).

Q4: What are common units for molecular mass?
A: The standard unit is grams per mole (g/mol), but sometimes unified atomic mass units (u or Da) are used.

Q5: How accurate is this calculation?
A: The accuracy depends on the precision of your input values. The calculator provides results with four decimal places for precision.