Question
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Answer (Detailed Solution Below)
Option 3 : $239$ kJ mol$^{-1}$ / $239$ kJ mol$^{-1}$
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Detailed Solution
सही उत्तर $239$ kJ mol$^{-1}$ / $239$ kJ mol$^{-1}$ है।
Key Points
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prepsnap.in • Part -AQuestion:
The energy of one mole of photons of wavelength $500$ nm is closest to / $500$ nm तरंगदैर्घ्य के फोटॉनों के एक मोल की ऊर्जा निकटतम है
1.
$24$ kJ mol$^{-1}$ / $24$ kJ mol$^{-1}$
2.
$3.98 \times 10^{-16}$ kJ mol$^{-1}$ / $3.98 \times 10^{-16}$ kJ mol$^{-1}$
3.
$239$ kJ mol$^{-1}$ / $239$ kJ mol$^{-1}$
4.
$2.39 \times 10^{3}$ kJ mol$^{-1}$ / $2.39 \times 10^{3}$ kJ mol$^{-1}$
Correct Answer: $239$ kJ mol$^{-1}$ / $239$ kJ mol$^{-1}$
$E = N_A hc/\lambda = (6.022 \times 10^{23})(6.626 \times 10^{-34})(3.00 \times 10^8)/(500 \times 10^{-9}) = 2.39 \times 10^5$ J mol$^{-1} = 239$ kJ mol$^{-1}$. / $E = N_A hc/\lambda = (6.022 \times 10^{23})(6.626 \times 10^{-34})(3.00 \times 10^8)/(500 \times 10^{-9}) = 2.39 \times 10^5$ J mol$^{-1} = 239$ kJ mol$^{-1}$।
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