حاسبة الكتلة المولية.

Uses IUPAC standard atomic weights; isotopic variation is ignored. Charges are ignored for the mass. Everything is calculated in your browser; nothing you type is uploaded.

The formula is parsed with nested brackets and hydrate dots, element counts are multiplied out, and each count is multiplied by its standard atomic weight.

CuSO4·5H2O has a molar mass of 249.677 g/mol, 25.45 % of it copper; 10 g is 0.040052 mol.