C is the answer because animals and plants need water.
Answer:
Have no valence electrons because they are stable.
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BY GERALD GREAT
Answer:
Ea=5.5 Kcal/mole
Explanation:
Let rate constant are
and
at temperature
and 
By using Arrhenius equation at two different two different temperature,
By putting value of R=2 cal/mole.K

By rounding off upto 2 significant figure;

Answer:
-2
Explanation:
Consider object is starting 12 units right from the reference point which is 0.
Assign the right direction positive sign.
when object is moving 14 units on left direction the position of object will be two units to the left side of reference point.
Assign the left direction negative sign position will be -2.
Answer:
Increasing the temperature
Explanation:
According to Le Chatelier's principle, "if any of the conditions of a system in equilibrium is changed, the system will adjust itself in order to annul the effect of the change".
Since the forward reaction is exothermic, this suggests that heat is given off in the reaction.
Increasing the temperature will favors the reverse process which is endothermic.
In going from the reactants to the the products, the reaction is deemed exothermic which suggests that it produces heat.
The backward reaction is endothermic i.e it absorbs heat. If the temperature is increased, this process will be favored and more reactants produced. Less of the diiodine pentoxide will form. There is a leftward shift of the equilibrium