1. What is Molecular Weight?

Molecular weight (MW) is the sum of the atomic weights of all atoms in a molecule. It's expressed in atomic mass units (amu) or grams per mole (g/mol) and is crucial for various chemical calculations.

2. How Does the Calculator Work?

The calculator uses the molecular weight formula:

Where:

• \( n_i \) — Number of atoms of element i
• \( m_i \) — Atomic mass of element i

Explanation: The calculator parses the chemical formula and sums the atomic masses of all constituent atoms.

3. Importance of Molecular Weight Calculation

Details: Molecular weight is essential for stoichiometric calculations, preparing solutions with specific concentrations, and determining reaction yields in chemistry and biochemistry.

4. Using the Calculator

Tips: Enter the chemical formula using standard notation (e.g., H2O, C6H12O6). The calculator will parse the formula and calculate the molecular weight.

5. Frequently Asked Questions (FAQ)

Q1: What format should I use for chemical formulas?
A: Use standard chemical notation with element symbols followed by numbers for atom counts (e.g., H2O, C6H12O6, NaCl).

Q2: Does the calculator support complex formulas?
A: Yes, the calculator can handle most standard chemical formulas including those with parentheses and hydration states.

Q3: How accurate are the calculations?
A: Calculations use standard atomic weights from the IUPAC periodic table and are accurate for most laboratory applications.

Q4: Can I calculate formula weight too?
A: Yes, the calculator works for both molecular compounds and ionic compounds (formula weight).

Q5: Are hydration states supported?
A: Yes, you can include hydration states (e.g., CuSO4·5H2O) in your formula input.