1.

The formula of water molecule is H2O. What information do you get from this formula?

Answer»
  • Water is a combination of hydrogen and oxygen. 
  • Two hydrogen atoms and one oxygen atom combine to form one water molecule. 
  • Molecular weight of water molecule is 18. [Hydrogen 1, Oxygen 16. H2O ⇒ 2 × 1 + 16=18] 
  • 18 g of water molecule contains 6.022 × 1023 particles in it. 
  • Valency of hydrogen is 1 and oxygen is 2.


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