Chemistry: Speed of Light Math Quiz (20 points) -21 What is the wavelength of light with an energy of 4.8 x 10 J? Include the proper unit in the answer.

Speed of Light Math Quiz (20 points) -21 What is the - id20219602513, reggiegilbert1995

fonsworth5

12.02.2022

The wavelength of light : 4.14 x 10⁻⁵ m

Further explanation

Radiation energy is absorbed by photons

The energy in one photon can be formulated as

$\large{\boxed{\bold{E\:=\:h\:.\:f}}}$

Where

h = Planck's constant (6,626.10⁻³⁴ Js)

f = Frequency of electromagnetic waves

The energy of the light = 4.8 x 10⁻²¹ J

The wavelength of light :

$\tt E=h.\dfrac{c}{\lambda}\\\\\lambda=\dfrac{h.c}{E}\\\\\lambda=\dfrac{6.626.10^{-34}\times 3.10^8}{4.8.10^{-21}}\\\\\lambda=4.14.10^{-5}~m$

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zackarygonzalez1028

22.11.2020

The equilibrium constant is $3.3\times 10^{-4}$

Explanation:

Initial concentration of I_2 = 0.095 M

The given balanced equilibrium reaction is,

$I_2(g)\rightleftharpoons 2I(g)$

Initial conc. 0.095 M 0 M

At eqm. conc. (0.095-x) M (2x) M

Given : 2x = 0.0055

x = 0.00275

The expression for equilibrium constant for this reaction will be,

$K_c=\frac{[l]^2}{[I_2]}$

Now put all the given values in this expression, we get :

$K_c=\frac{(0.0055)^2}{(0.095-0.00275)}$

$K_c=\frac{(0.0055)^2}{0.09225}=0.00033$

Thus the equilibrium constant is $3.3\times 10^{-4}$

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