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Stoichiometry Calculator

Balance chemical equations and calculate mole relationships between reactants and products.

Stoichiometry Calculations
Balance equations and calculate mole ratios
Stoichiometry Guide

Key Concepts:

  • • Mole ratios from balanced equations
  • • Conservation of mass
  • • Limiting and excess reactants
  • • Theoretical vs actual yield

Balancing Steps:

  1. Write the unbalanced equation
  2. Count atoms of each element
  3. Balance complex molecules first
  4. Balance simple elements last
  5. Use whole number coefficients
  6. Verify all elements balance

Calculation Steps:

  1. Balance the chemical equation
  2. Convert given to moles
  3. Use mole ratio from equation
  4. Convert to desired units

Example:

2H₂ + O₂ → 2H₂O
If 4 mol H₂ react:
4 mol H₂ × (1 mol O₂/2 mol H₂) = 2 mol O₂
4 mol H₂ × (2 mol H₂O/2 mol H₂) = 4 mol H₂O

Applications:

  • • Chemical synthesis planning
  • • Industrial process optimization
  • • Environmental chemistry
  • • Pharmaceutical manufacturing
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