Question

find number of moles in 90 grams of wate

Answer 1

Molecular mass of H2O is 18 grams
No.of moles n = m / M
m is the weight of the given
M is the molecular weight.
n = 90/18 = 5
Therefore 5 moles are present in 90 gms of water.
Please mark as branliest answer

Answer 2

18is the molecular weight of water. So 18 grams of water is called one mole of water.
So, number of moles in 90 grams of water is=90/18
=5