g Calculate the energy of a photon that has a wavelength of 965 nm. 2.06x10-33 J 2.06x10-19 J 3.78x10-28 J 3.78x10-29 J None of these

The energy of a photon that has a wavelength of 965 nm is

Explanation:

The relation between energy and wavelength of light is given by Planck's equation, which is:

where,

E = energy of the photon =

h = Planck's constant  =

c = speed of light  =

= wavelength of light  = 965 nm =    

Putting in the values we get:

Thus the energy of a photon that has a wavelength of 965 nm is

Mole of a substance is defined as the molecular weight in grams of that substance. According to Avogadro’s number, one mole of any substance is equal to 6.023x10^23 units. The units can be atoms, formula units, molecule, ions, electrons. In this problem, there are three moles of CO2. Since the Avogadro’s number states that one mole of ANY substance is equal to 6.023x10^23 units, you can multiply 6.023x10^23 units by three. You will get 1.80x10^24 units. Change the units into molecules and you will get 1.80x10^24 molecules. The answer is a.