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A leak in the air conditioning system of an office building releases 12 kg of CHF2Cl per month…?

A leak in the air conditioning system of an office building releases 12 kg of CHF2Cl per month. If the leak were allowed to continue , how many kilograms of Cl would be admitted into the atmosphere each year?

12 kg x 12 months = 144 kg of the refrigerant CHF2Cl

However, Cl is only a portion of the refrigerant so you need to find what percentage of the weight is due to the 2 Cl atoms versus the one each of Carbon, Hydrogen, and Florine.

From the periodic chart, I found the weights to be (in order) 12.0107
1.00794 + 18.998404 + 70.9054 = 102.922444
and
70.09054 is 68.89% of the total.

So, multipy the 144 kg by 68.89% and you have your weight of Chlorine in kg.

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