Question

how many water molecules are present in 18gm of water

Answer 1

18g of water contains 6.022×10^23 molecules of water… One mole is the answer! ;-) Because mole is a defined amount of quantity.

Answer 2

your answer :-

first take out number of moles

solution:-

no of moles= given weight/ molecular weight

molecular weight of h2o =2+16=18

no of moles =18/18=1

now ,

no of molecules in water = moles × 6.02×10^23

answer:- 6.02×10^23 molecules

@ananya☺