Question

One molecule of a substance absorbs a quantum of energy .The energy involved when 1.5 moles absorbs a red light of frequency 7.5×10^-14 will be​

Answer 1

1.5 moles contains= 6.022×10²³×1.5

=9.033×10²³ particles

e=nhv

6.6×10⁻³⁴×9.033×10²³×7.5×10⁻¹⁴

=447.133×10⁻²⁵ energy is involved