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Question

How would you calculate the molar mass of water?


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Solution

Molar mass:-

  • Molar mass of a compound is the mass of that compound present in 1 mole.
  • It is the combined atomic masses of all the individual elements present in that molecule.
  • Unit of molar mass isgmol-1.

Molar mass of Water:-

Step 1: Calculate the molar mass of water

We know that molar mass of 1 mole of Hydrogen is 1gmol-1

and, molar mass of 1 mole of Oxygen is 16gmol-1

We know that the chemical formula of water is H2O

molar mass of water is

H2O=2×1+16=2+1618gmol-1

Therefore, molar mass of water is18gmol-1.


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