what is the E associated with b.) one mole of photons of 3.91 x 1019 Hz...

Question

Question

what is the E associated with

Answer 1

Answer #1

Given

Frequency = 3.91 $\times$ 10¹⁹ Hz

we know

h = Plancks constant = 6.626 $\times$ 10^-34 J.s

we have formula

Energy of photon = h $\times$ frequency

= 6.626 $\times$ 10^-34 J.s $\times$ 3.91 $\times$ 10¹⁹ Hz

= 2.59 $\times$ 10^-14 J

1 mole = Avogadros number of photons = 6.022 $\times$ 10²³ photons

so the energy of one mole of photon is

Energy = 2.59 $\times$ 10^-14 J $\times$ 6.022 $\times$ 10²³ mol^-1

= 1.56 $\times$ 10¹⁰ J/mol

= 1.56 $\times$ 10⁷ kJ/mol

Answer 2

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