Question

Find the no. Of electron and neutron in 5.6ltr H2o at STP

Answer 1

Molecular weight of H2O=18g

No. of neutrons in 1 mole of H2O= 8 NA   ( from O atom, as H has no neutron)

Given moles of H2O=5.6/22.4=0.25

 Total no. of neutrons present =0.25×8NA= 2 NA

No. of electrons in 1 mole of H2O= 10 NA.

Total No. of electron present= 10NA

[NA= 6.2× 10²³]

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