Explain why the model of this chemical reaction obeys the Law of Conservation of Matter. A) because there are the same number of atoms of each element shown on both sides B) because they both start and end with diatomic (two-atomed) molecules C) because they both start and end with the same types of particles D) because they both start and end with two sets of particles

answer:

it is a or d

Explanation:

an energy transformation flow diagram is shown

where is it ?

speed of light in vacuum is 300,000 km/s

speed of light in other mediums is given by the expression v = c/n, where c is the speed of light in vacuum and n is the refractive index of medium.

for the first medium v = 200,000 km/s

  so, refractive index of medium = 300000/200000 = 1.5

    1.5 refractive index is usually for glass. so first medium is glass.

for the second medium v = 250,00 km/s

so, refractive index of medium = 300000/250000 = 1.2

    1.2 refractive index is usually for water. so second medium is water.

for the third medium v = 0 km/s

so, refractive index of medium = 300000/0 = ∞

    ∞ refractive index is usually for opaque mediums. so third medium is opaque medium.