# Give me answer of this mcqs.

Dear student,

1) The molar mass of water is 18.
Thus, 18 g of water contains, Avogadro's number (${N}_{A}$)of water molecule.
Therefore, 540 g of water will have $\frac{540}{18}×{N}_{A}=30{N}_{A}$
​​​​Hydrogen has no neutrons and oxygen has 8 neutrons.
Water compose of two hydrogen atoms and one oxygen atom.
Thus total number of neutrons in each water molecule is 8.
Therefore, total number of neutrons in 540 g of water is,