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A substance absorbs 2.0 x 1016 quanta or radiations per second and 0.002 mole of it reacts in 1200 seconds. What is the quantum yield or the reaction (N = 6.02 x 1023)?
- a)50
- b)40
- c)80
- d)100
Correct answer is option 'D'. Can you explain this answer?
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Most Upvoted Answer
A substance absorbs 2.0 x 1016quanta or radiations per second and 0.00...
Given:
Number of quanta absorbed per second (N) = 2.0 x 10^16
Amount of substance reacted (n) = 0.002 mol
Time taken for reaction (t) = 1200 seconds
Avogadro's number (N_A) = 6.02 x 10^23
To find:
Quantum yield of the reaction
Formula:
Quantum yield (Φ) = (Number of molecules reacted)/(Number of quanta absorbed)
Number of molecules reacted = Amount of substance reacted x Avogadro's number
Number of quanta absorbed = Number of quanta absorbed per second x time taken
Calculation:
Number of molecules reacted = 0.002 mol x 6.02 x 10^23/mol = 1.204 x 10^21
Number of quanta absorbed = 2.0 x 10^16 x 1200 = 2.4 x 10^19
Quantum yield (Φ) = (1.204 x 10^21)/(2.4 x 10^19) = 100
Therefore, the quantum yield of the reaction is 100.
Number of quanta absorbed per second (N) = 2.0 x 10^16
Amount of substance reacted (n) = 0.002 mol
Time taken for reaction (t) = 1200 seconds
Avogadro's number (N_A) = 6.02 x 10^23
To find:
Quantum yield of the reaction
Formula:
Quantum yield (Φ) = (Number of molecules reacted)/(Number of quanta absorbed)
Number of molecules reacted = Amount of substance reacted x Avogadro's number
Number of quanta absorbed = Number of quanta absorbed per second x time taken
Calculation:
Number of molecules reacted = 0.002 mol x 6.02 x 10^23/mol = 1.204 x 10^21
Number of quanta absorbed = 2.0 x 10^16 x 1200 = 2.4 x 10^19
Quantum yield (Φ) = (1.204 x 10^21)/(2.4 x 10^19) = 100
Therefore, the quantum yield of the reaction is 100.
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Community Answer
A substance absorbs 2.0 x 1016quanta or radiations per second and 0.00...
QUANTUM YEILD= no. of reactants reacted or product produced/no. of quanta absorbed.
or for simplification the formula goes like this:-
QUANTUM YEILD PER MOLECULE=12×n/100×E×lambda
QUANTUM YEILD PER MOLE MOLECULE=12×n/100×E×lambda.
{Hope it helps}
or for simplification the formula goes like this:-
QUANTUM YEILD PER MOLECULE=12×n/100×E×lambda
QUANTUM YEILD PER MOLE MOLECULE=12×n/100×E×lambda.
{Hope it helps}
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