Question

calculate the number of molecules in a drop of water weighing 0.75g

Answer 1

75 gram of water in the 100/ 75

Answer 2

moles = given wt/molar mass
= 0.75/18

molecules = moles × nA
= 6.022× 10²³ × 0.75/18
= 2.508 ×10²³

hope this helps.
mark it the Brainliest pls. :)