STEM
Chemistry, step by step
Balance equations, convert between moles and grams and follow reaction mechanisms, with every conversion factor shown.
Coverage
Topics we cover
- Atomic structure
- Chemical bonding
- Stoichiometry
- Balancing equations
- Acids and bases
- Organic reactions
Worked example
ChemistrySolved
Question
Balance: H₂ + O₂ → H₂O
- Step 1: Count the atoms: 2 H and 2 O on the left; 2 H and 1 O on the right
- Step 2: Put a 2 in front of H₂O to balance the oxygen: H₂ + O₂ → 2H₂O
- Step 3: Put a 2 in front of H₂ to rebalance the hydrogen
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