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Chemistry Question on Structure of atom

Excited hydrogen atom emits light in the ultraviolet region at 2.47×1015 Hz2.47 \times 10^{15}\, Hz. With this frequency, the energy of a single photon is : (h=6.63×10−34 Js)(h = 6.63 \times 10^{-34}\, Js)

A

8.041×10−408.041 \times 10^{-40} J

B

2.680×10−192.680 \times 10^{-19} J

C

1.640×10−181.640 \times 10^{-18} J

D

6.111×10−176.111 \times 10^{-17} J

Answer

1.640×10−181.640 \times 10^{-18} J

Explanation

Solution

E=hvE=hv
=6.63×10−4×2.47×1015= 6.63\times10^{-4}\times2.47\times10^{15}
=1.640×10−18 J=1.640\times10^{-18}\,J