Question

The energy equivalent of 1g substance?

Answer 1

m = 1g = 10−3 kg

c = velocity of light = 3× 108  m/s

Therefore,

E = mc2

E = 10−3  × (3× 108  )2

E = 9 × 1013  J

hope it's helpful. :-)

Gram equivalent mass is mass of one mole of element, molecule, ion divided by their valency or number of electrons shared.