Question

How many molecules of water are there in 54 g of H2O?
( At mass of H = 1u, O= 16u )

Answer 1

Answer:

3 * 6.022*10^23 molecules

Explanation

Molar weight of water is 18 g

So, 54 gram includes 3 moles

So, 3NA molecules=3*6.022*10^23