Stoichiometry Calculator

Use our advanced chemistry calculator to solve stoichiometry problems instantly. Balance equations, convert between moles and grams, calculate percent yields, and more!

Stoichiometry calculator showing chemical equations and molecular models

Results

Balanced Equation
2H₂ + O₂ → 2H₂O
Moles
1.25 mol
Grams
22.5 g
Theoretical Yield
45.2 g
Percent Yield
89.3%

Step-by-Step Solution

1

Balance the chemical equation: 2H₂ + O₂ → 2H₂O

2

Convert given quantity to moles: 25.0 g H₂O × (1 mol/18.02 g) = 1.39 mol H₂O

3

Use mole ratios from balanced equation: 1.39 mol H₂O × (2 mol H₂/2 mol H₂O) = 1.39 mol H₂

4

Convert moles to desired units: 1.39 mol H₂ × (2.02 g/mol) = 2.81 g H₂

Key Features of Our Stoichiometry Calculator

Our chemistry calculator provides comprehensive solutions for all your stoichiometry needs:

Balance Chemical Equations

Automatically balance any chemical equation with our advanced algorithm.

Mole-Mass Conversions

Convert between moles and grams for any compound with precise calculations.

Percent Yield Calculations

Determine theoretical, actual, and percent yields for chemical reactions.

Combustion Analysis

Solve combustion stoichiometry problems with step-by-step solutions.

Limiting Reactant

Identify the limiting reactant and calculate maximum product yields.

Word Problem Solver

Solve complex stoichiometry word problems with detailed explanations.

How Our Stoichiometry Calculator Works

Our calculator uses advanced algorithms to provide accurate chemistry solutions:

1

Enter Your Chemical Equation

Input your unbalanced or balanced chemical equation. Our calculator can handle both ionic and molecular equations.

2

Select Calculation Type

Choose from mole-to-gram conversions, percent yield, limiting reactant analysis, or other stoichiometry calculations.

3

Input Your Values

Enter the known quantities with their appropriate units (grams, moles, liters at STP, or particles).

4

Get Instant Results

Receive accurate calculations with step-by-step explanations showing the complete solution process.

Example: Mole to Gram Conversion

Convert 2.5 moles of NaCl to grams:

1

Find molar mass of NaCl: Na (22.99 g/mol) + Cl (35.45 g/mol) = 58.44 g/mol

2

Multiply moles by molar mass: 2.5 mol × 58.44 g/mol = 146.1 g

3

Final answer: 2.5 moles NaCl = 146.1 grams NaCl

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For advanced stoichiometry calculations, check out this comprehensive stoichiometry calculator.

About Our Stoichiometry Calculator

Our free online stoichiometry calculator was developed by chemistry educators to help students and professionals solve complex chemical equations quickly and accurately.

Why Use Our Calculator?

  • Accuracy: Precise calculations using up-to-date atomic weights
  • Education: Step-by-step solutions to help you learn
  • Versatility: Handles all types of stoichiometry problems
  • Accessibility: Free to use with no registration required
  • Mobile-Friendly: Works perfectly on all devices

Chemistry Facts

Avogadro’s number: 6.022 × 10²³ particles per mole

STP conditions: 0°C (273K) and 1 atm pressure

Molar volume of gas at STP: 22.4 L/mol

This stoichiometry calculator saved me hours of homework time! The step-by-step solutions helped me understand the concepts better than my textbook.

– Sarah K., Chemistry Student

As a chemistry teacher, I recommend this tool to all my students. It’s accurate, educational, and helps build confidence in solving stoichiometry problems.

– Dr. Michael Chen, High School Chemistry Teacher
Dr. Sarah Johnson

About the Author

Dr. Sarah Johnson, PhD is a chemistry professor with over 15 years of experience in chemical education. She earned her doctorate in Organic Chemistry from MIT and has published numerous research papers on chemical education methodologies. Dr. Johnson developed this stoichiometry calculator to help students overcome common challenges in understanding chemical calculations.