Question

Calculate the number of molecules in a drop of water weighing 0.09 g.​

Answer 1

Hey mate.... Here's your answer....

Gram-molecular mass of water=18g

Number of moles in 0.9g of water =0.918

⇒0.05

Number of water molecules in one mole of water=6.02×1023

Number of molecules of water in 0.05 moles

⇒0.05×6.02×1023

⇒3.010×1022

Hope this is helpful to you.....

(I think this will be right answer )