The Earth’s ozone layer is under attack in part by chlorine released when ultraviolet radiation breaks apart certain fluorocarbons. Consider three fluorocarbons known as CFC-11 (CCl3F), CFC-12 (CCl2F2), and HCFC-22 (CHF2CL). (a) Calculate the percentage by weight of chlorine in each of these fluorocarbons. (b) If each kilogram of CFC-11 could be replaced by 1 kg of HCFC-22, by what percentage would the mass of chlorine emissions be reduced

Consider the following unbalanced equation for the combustion of hexane: αc6h14(g)+βo2(g)→γco2(g)+δh2o(g) part a balance the equation. give your answer as an ordered set of numbers α, β, γ, use the least possible integers for the coefficients. α α , β, γ, δ = nothing request answer part b determine how many moles of o2 are required to react completely with 5.6 moles c6h14. express your answer using two significant figures. n n = nothing mol request answer provide feedback

Which process describes vaporization that takes place below the surface of a liquid? condensation melting boiling evaporation

Which type of intermolecular attractions holds ammonia molecules together with other ammonia molecules?