Question

Question is in the attachment​

Answer 1

density of water is 1g/ml

So

540 gram of Water Present

Mole = weight /Molecular Weight

Mole = 540/18

Mole = 30

Thanks for reading

Answer 2

water(H2O)

Given mass of water = 540g

molar mass of water= 18g/mol

so, number of moles = molar mass/given mass

=18 /540=3

so, number of moles present in 540g of water will be 30 moles.