Question

Calculate the number of neutrons preselnt in 4.5g of H2O .​

Answer 1

Answer:

option (d)

Explanation:

mass of H2O = 18 g

given mass = 4.5 g

no. of mole = 4.5/18 = 0.25 mole

1 mole = 6.022 * 10^23 electron

no . of electron = no. of proton  

no. of proton in 0.25 mole = 0.25 * 6.02 * 10^23 = 1.505 * 10^23 proton