OnlineCBT
Chemistry · Structure of atom
हिन्दीCalculate the energy of one mole of photons of radiation whose frequency is \( 5 \times 10^{14} \text{ s}^{-1} \).
Correct answer · Option 1
\( 1.99 \times 10^5 \text{ kJ mol}^{-1} \)
Explanation
Energy of one mole \( E = N_A h \nu = 6.022 \times 10^{23} \times 6.626 \times 10^{-34} \times 5 \times 10^{14} = 1.99 \times 10^5 \text{ J mol}^{-1} = 199 \text{ kJ mol}^{-1} \) (or correct scaling).
