Home
Class 10
PHYSICS
Calculate the number of water molecul...

Calculate the number of water molecules present in one drop of water which weights 0.18 g.

Text Solution

Verified by Experts

The Molecular Mass of water `H_(2)O` is 18.
18 g of water molecule = 1 mole
0.18 g of water = `(1)/(18)xx0.18=0.01` mole.
One mole of water contains `6.023xx10^(23)` (water molecules)
`therefore 0.01` mole of water contains `(6.023)/(1)xx10^(23)xx0.01=6.023xx10^(21)` molecules.
Promotional Banner

Topper's Solved these Questions

  • SAMPLE PAPER - 14

    FULL MARKS|Exercise PART-III (ANSWER ANY SEVEN QUESTIONS)|8 Videos

  • SAMPLE PAPER - 14

    FULL MARKS|Exercise PART-IV (ANSWER ALL THE QUESTIONS)|6 Videos

  • SAMPLE PAPER - 14

    FULL MARKS|Exercise PART-IV (ANSWER ALL THE QUESTIONS)|6 Videos

  • SAMPLE PAPER - 12

    FULL MARKS|Exercise PART - IV|6 Videos

  • SAMPLE PAPER - 16

    FULL MARKS|Exercise PART - IV|6 Videos

Similar Questions

Explore conceptually related problems

(i) Calculate the number of water molecule present in one drop of water which weighs 0.18 g. (ii) Give the salient features of "Modern atomic theory".

(i0 Calculate the number of water molecule present in one drop of water which weighs 0.18 g. (ii) Calculate the number of moles in 27 g of Al. (iii) Calculate the grams of 22 moles of hydrogen molecule, H_(2) .

calculate the number of molecules present in the 36 g water .

The number of molecules present in one gm of hydrogen, is

The number of water molecules in a drop of water weighing 0.018 g is

The number of water molecules in a drop of water weighing 0.018g is

calculate the number of moles present in 9 g of ethane.