How many molecules of h2o are there in 1.0 g of h2o?

Molar mass H₂O = 18.0 g/mol

number of moles :

1.0 / 18.0 => 0.055 moles

1 mole 6.02 x 10²³ molecules
0.055 moles  ? molecules

molecules = 0.055 x ( 6.02 x 10²³) / 1

molecules = 3.311x10²² / 1

= 3.311 x 10²² molecules

hope this helps!

Yeah, but what are you trying to ask?

Answer trigonal pyramidal;