Question

How many molecules are there in 90 grams of water

Answer 1

Hey,

6.023x10^23 molecules are contained in 18g of water.

90g of water will contain = 6.023 x 10^23 x 5

= 30. 115 x 10^23 molecules

Answer 2

Number of moles can be calculated by the following formula:

Number of moles in 90g water= 90/(1+1+16) = 5

Number of molecules in 90g of water = 5x6.023x10^23

= 30.115x10^23