How many photons are produced in a laser pulse of 0.366 j at 508 nm

We know that

E = hν

Where

E = energy of one photon

h = Planck's constant = 6.626x10^-34 J s  

ν = frequency

the relation between frequency and wavelength and speed of light is

ν = c / λ

Where c = speed of light = 3.00x10^8 m/s  

λ = wavelength = 508 nm = 508 X 10^-9 m

Putting values to get energy of each photon

E = hc / λ = (6.626x10^-34 J s) x (3.00x10^8 m/s) / 508x10^-9 m = 3.91 X 10^19 J

Number of photons = energy given / energy of each photon

Number of photons = 0.366 J / 3.91 X 10^19 J = 9.36 X 10^17

i think so it’s will be b yes i believe its

the best answer is d because the strong cohesion is caused by the ability of water molecules to undergo hydrogen bonding.

a is incorrect because when water solidifies, it becomes   ice, which expands and occupies a bigger volume for the same mass of water in its liquid state.

b is incorrect because water has high surface tension. besides bonding to itself it hydrogen bonds to other molecules at the top decreasing possibility for breaking of attractive forces.

c is incorrect because the water molecule has oxygen which is highly electronegative and so pulls the electron pair towards itself creating a dipole moment, making the molecule polar.

e is incorrect because water has strong adhesion, ability to stick to other molecules such as glass because of this molecules having stronger hydrogen bonding than water.