Do I need to balance the equation first?
Yes, accurate stoichiometry requires a balanced chemical equation to determine the correct mole ratios (coefficients).
Calculator
Enter your values
Results
Moles Produced
1.0000
Mass Produced (g)
18.0150
Reaction Analysis
Theoretical Yield
Mole Ratio
For every 1 mole of A, you get 1.00 moles of B. This is the theoretical maximum yield.
Mass Relationship
Starting with 1 moles of A yields 18.0150g of B. Actual yield may be lower due to impurities or incomplete reaction.
How to Use
Step-by-step instructions
- 1Enter the moles of the known substance (A).
- 2Enter the coefficients from the balanced equation (a and b).
- 3Enter the molar mass of the target substance (B).
- 4The calculator will compute the moles and mass of B produced.
Mole Ratio
Calculates the moles of substance B produced from moles of substance A using the balanced chemical equation coefficients (aA → bB).
n(B) = n(A) × (b/a)Variables:
n(A)Moles of reactant AaCoefficient of AbCoefficient of BExample
Water Synthesis
Inputs:
Moles H₂:2
Coeff H₂:2
Coeff H₂O:2
MM H₂O:18.02
Steps:
- 1.Ratio = 2/2 = 1
- 2.Moles H₂O = 2 × 1 = 2 mol
- 3.Mass H₂O = 2 × 18.02 = 36.04 g
Result:
36.04 g