Question

the ionization energy of hydrogen is 1312 kj/mol express the value in eV/atom

Answer 1

eV = electron volt

kJ = kilojoule

1 eV = 1.6021765×10⁻²² kJ 

 

We first convert kJ to Ev

 

eV = 1312/(1.6021765×10⁻²²) = 8.18886 x 10^24

 

Then we convert to Ev/Atom by dividing by Avogadro’s number

 

eV/Atom =  (8.18886 x 10^24)/6.022x10^23)

 

              = 13.6

Answer 2

Explanation:

Ag3A = 3Ag + A

3 moles of Ag combine with 3 moles of A

Mass of Ag = 0.37

Mass of A = 607 - 0.37 = 606.63

Moles of Ag = 0.37/108 = 0.003426

Moles of A = 0.003426/3 = 0.001142

Molar mass of A = 606.63/0.001142 = 531211

A tribasic acid has 3 atom of H

Molar mass of the acid = 3 + 531211 = 531214 g/mol