Carbon needs four more valence electrons, or a total of eight valence electrons, to fill its outer energy level.
<u>Answer:</u> The molality of magnesium chloride is 4.93 m
<u>Explanation:</u>
To calculate the molality of solution, we use the equation:
Where,
= Given mass of solute 
= 56.3 g
= Molar mass of solute = 95.2 g/mol
= Mass of solvent = 0.12 kg
Putting values in above equation, we get:
Hence, the molality of magnesium chloride is 4.93 m
Chlorofluorocarbons are a class of organic compounds that were used as propellants in the late 20th century. The problem with CFC's is that they attack the ozone layer, breaking it down. The weakened ozone layer is not able to stop UV light from reaching the earth, so the amount of UV light reaching the earth increases. This results in increased temperatures, and the death of vegetation.
Therefore, the answer is B.
