Frequently Asked Questions
How do I convert grams to moles?
Divide the mass in grams by the molar mass of the substance in g/mol. For example, 58.44 g of NaCl divided by its molar mass of 58.44 g/mol equals exactly 1.0 mole. The molar mass is the sum of the atomic masses of all atoms in one formula unit, found on the periodic table.
What is a mole in chemistry?
A mole is a counting unit equal to 6.022 x 10^23 particles (Avogadro's number). Just as a dozen means 12, a mole means 6.022 x 10^23. One mole of any substance contains the same number of formula units and has a mass in grams equal to its molar mass - so 1 mol of water = 18.015 g.
Where do I find the molar mass of a compound?
Add the atomic masses of every atom in the formula. Atomic masses appear on the periodic table under each element symbol. For H2O: 2 hydrogen atoms (1.008 g/mol each) + 1 oxygen atom (15.999 g/mol) = 18.015 g/mol. For ionic compounds use formula mass - same calculation, different name.
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This calculator provides estimates for informational purposes only. Results are based on assumptions and may not reflect actual outcomes. Consult qualified professionals in relevant fields before making important decisions based on these results.