Mole Ratio Calculator Formula
Understand the math behind the mole ratio calculator. Each variable explained with a worked example.
Formulas Used
Moles of Unknown
moles_unknown = moles_known * (coeff_unknown / coeff_known)Variables
| Variable | Description | Default |
|---|---|---|
moles_known | Moles of Known Substance(mol) | 3 |
coeff_known | Coefficient of Known | 2 |
coeff_unknown | Coefficient of Unknown | 3 |
How It Works
How to Use Mole Ratios
Formula
moles_unknown = moles_known × (coeff_unknown / coeff_known)
The mole ratio comes directly from the balanced equation coefficients.
Worked Example
3 mol of A with 2A -> 3B. How many moles of B?
- 01Mole ratio = 3/2
- 02Moles B = 3 × (3/2) = 4.5 mol
Frequently Asked Questions
What is a mole ratio?
The ratio of coefficients from a balanced equation, showing how many moles of one substance react with or produce another.
Where do coefficients come from?
From the balanced chemical equation. They are the numbers placed before each formula.
Can I use this for any pair of substances?
Yes, for any two substances in the same balanced equation, use their respective coefficients.
Learn More
Guide
How to Balance Chemical Equations
Step-by-step guide to balancing chemical equations. Learn the law of conservation of mass, inspection method, tips for complex equations, and common mistakes.
Ready to run the numbers?
Open Mole Ratio Calculator