Which statement is a valid conclusion about the activation energy of the reverse reaction if the forward reaction is exothermic?

a ) the activation energy of the reverse reaction is the same as that of the forward reaction.

b) none of the listed answers are correct

c) no valid conclusion can be drawn from the information provided.

d) the activation energy of the reverse reaction is less than that of the forward reaction.

e) the activation energy of the reverse reaction is greater than that of the forward reaction.

e) The activation energy of the reverse reaction is greater than that of the forward reaction.

Explanation:

in scientific notation, the value of the  speed of light in a vacuum

  will be written as 2.995 * 10^8. when this value is represented in the form of

  a * 10^b, then, a = 2.995 and b = 8.

the value of the speed of light in a vacuum given above can also be rounded up to approximately 300000000. in this case, the scientific notation will be written as 3 *10^8.

ca has a crystalline lattice with positive ions (since it is a metal, metals are positively charged) and electrons flow freely in its structure since the ca atoms have a large nuclear radius so the electrons are not tightly held, therefore the electrons can flow freely since they are not being highly attracted by the nucleus. moreover, one of the properties of metals are that they are conductors of electricity, thus proving ca is the element.