Stop struggling with chemistry conversions. Learn the step-by-step method to convert mass to moles and calculate reaction yields.
The Golden Rule of Chemistry
"Atoms don't count grams, they count moles."
If you mix 10g of Hydrogen with 10g of Oxygen, you won't get 20g of Water perfectly. You have to look at the molar ratio.
The Roadmap
To solve almost any stoichiometry problem, follow this path:
- Mass (grams) $\rightarrow$ Divide by Molar Mass $\rightarrow$ Moles
- Mole Ratio (from balanced equation)
- Moles $\rightarrow$ Multiply by Molar Mass $\rightarrow$ Mass (grams)
Molar Mass Explained
The Molar Mass (M) is the mass of one mole of a substance. It's the sum of the atomic masses from the periodic table.
- Carbon (C) = 12.01 g/mol
- Oxygen (O) = 16.00 g/mol
- CO₂ = 12.01 + 2(16.00) = 44.01 g/mol
The Formula
- n = Moles
- m = Mass (grams)
- M = Molar Mass (g/mol)
Instant Calculation
Don't waste time looking up periodic tables for every practice problem.
Our Stoichiometry Calculator lets you:
- Instantly convert Grams $\leftrightarrow$ Moles.
- Input custom Molar Masses.
- Visual "Reaction" interface.
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