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What is the chemical formula for water?

Practice Questions

Q1
What is the chemical formula for water?
  1. H2O
  2. CO2
  3. O2
  4. H2O2

Questions & Step-by-Step Solutions

What is the chemical formula for water?
  • Step 1: Understand that water is a compound made of two elements: hydrogen and oxygen.
  • Step 2: Know that each water molecule contains two hydrogen atoms and one oxygen atom.
  • Step 3: Write the symbol for hydrogen, which is 'H'.
  • Step 4: Since there are two hydrogen atoms, write 'H2'.
  • Step 5: Write the symbol for oxygen, which is 'O'.
  • Step 6: Combine the symbols to form the chemical formula: H2O.
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