Question

Calculate the number of moles and number of water molecules in 90g of water

Answer 1

Answer:

Water is H2O. So 90g of water contains 90/18= 5 moles of water.

Explanation:

hopefully it will help you

Answer 2

Answer:

To find the number of molecules in 90g of water, first, the number of moles in 90g of water has to be calculated followed by multiplying the moles with

Avogadro’s number (6.023x10^23).

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