Question

Because of increasing evidence of damage to the ozone layer, chlorofluorocarbon (CFC) production was banned in 1996. However, there are about 100 million auto air conditioners in operation that still use CFC-12 (CF₂Cl₂). These air conditioners are recharged from stockpiled supplies of CFC-12. If each of the 100 million automobiles contains 1.1 kg of CFC-12 and leaks 25% of its CFC-12 into the atmosphere per year, how much chlorine, in kg, is added to the atmosphere each year due to auto air conditioners? (Assume two significant figures in your calculations.)

Answer 1

Answer:

16,165 ton

Explanation:

120.91 g - 1 mole of CFC-12

1100 g - x mole of CFC-12

x = $\frac{1100}{120.91}$

x = 9,10 moles

9,10 moles - 100%

y - 25% that leakes

y = $\frac{9.10 * 25}{100}$

y = 2.28 mole

A mole of chlorine has 35,45 g, so 2 moles of chlorine has 70,90 g

1 mole of CFC-12 - 70,90 g

2.28 moles of CFC-12 - z

z = 70.90 * 2.28

z = 161,65 g of chlorine per air conditioner.

For 100 million air conditioner

t = 161.65 g * 100 * 10^6

t = 16,165 ton