Calculate the energy of a photon having a wavelength in thefollowing ranges.
(a) microwave, with λ = 50.00 cm
ev
(b) visible, with λ = 500 nm
ev
(c) x-ray, with λ = 0.50 nm
ev

The energy of a photon is given by the following formula:

(1)

Where:

is the Planck constant

is the frequency

Now, the frequency has an inverse relation with the wavelength :

(2)

Where is the speed of light in vacuum

Substituting (2) in (1):

(3)

Knowing this, let's begin with the answers:

For

For

For

As we can see, as the wavelength decreases, the energy increases.

answer: a ball

explanation: because it will bounce

  1.the balanced   chemical equation is as below

cu +   2 ag(no)₃ → cu(no₃)₂   +2 ag

2.the   much silver   produced   is   50.9 g

step 1: find the   moles of cu

moles =   mass÷   molar mass

  from periodic table the molar mass of cu = 63.5 g/mol

moles is therefore = 15.00 g÷ 63.5 g/mol = 0.236   moles

step 2: use the mole ratio to determine the   moles of ag

from equation above   cu: ag   is 1: 2

therefore the moles of ag   =0.236   moles   x 2/1 =0.472   moles

step 3: find the mass   of ag

mass = moles x molar mass

from periodic table   the molar mass of ag =107.87 g/mol

mass   = 0.472   moles x 107.87 g/mol = 50.9 g

3.   the   much   silver   collected worth is   1.797 oz

  convert   50.9 g   to oz

that is   1 gram = 0.0353 oz

          50.9 grams =?   oz

by cross multiplication

={(50.9 grams x 0.0353 oz) / 1   gram}   =1.797 oz