<u>Answer:</u> The volume of stock solution of calcium chloride required is 10 mL.
<u>Explanation:</u>
A solution consists of solute and solvent. A solute is defined as the component that is present in a smaller proportion while the solvent is defined as the component that is present in a larger proportion.
To calculate the amount of solute needed, the formula used is:
....(1)
where,
are the concentration and volume of stock solution of calcium chloride
are the concentration and volume of diluted solution of calcium chloride
Given values:

Plugging values in equation 1:

Hence, the volume of stock solution of calcium chloride required is 10 mL.
C: condensation
Examples are glasses fogging up and water droplets on a can of soda when it’s hot
The correct theory is that the way gravity is pushing them into the middle of earth which makes them the way they are
Option A. Exothermic reactions RELEASE energy, so the potential energy of the products will be less than the energy of the reactants.
Answer:
A chemical reaction is usually accompanied by easily observed physical effects, such as the emission of heat and light, the formation of a precipitate, the evolution of gas, or a color change