What is the frequency of a photon with an energy of 3.38 x 10-19 J?

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E =

h =

f = ?

Energy of Photon is given by,

                                   E = hf

Rearrange the equation,

                                    f =

where,

           E = energy

           h = planck's constant

           f = frequency

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Substitute the variable in the equation,

                                 f =

Simplify the equation,

                                  f = 5.10 x 10^14 Hz          

calculate how many grams of ammonia can be produced from 4.21 grams of

n2 + 3h2 = 2nh3

my answer:

25.0g n2 x (1 mol/ 28.0gn2) x (2 mol nh3/ 1 mol n2) x (17.0g nh3/ 1 molnh3) = 30.36g n2

25.0g h2 x (1 mol h2/ 2.00g h2) x (2 mol nh3/ 3 mol h2) x (17.0g nh3/ 1 mol nh3) = 141.67g h2

lr = n2

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