Polychlorinated biphenyls (PCBs), which were formerly used in the manufacture of electrical transformers, are environmental and health hazards. They break down very slowly in the environment. The decomposition of PCBs can be represented by the equation:

Question

Brittany Douglas

Chemistry

17 April, 06:11

Polychlorinated biphenyls (PCBs), which were formerly used in the manufacture of electrical transformers, are environmental and health hazards. They break down very slowly in the environment. The decomposition of PCBs can be represented by the equation:

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Answers (1)

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Amara Mcknight · Answer 1

C12H4Cl6 + 23 O2 + 2 H2O → 24 CO2 + 12 HCl

(a)

(13.5 mol O2) x (2 mol H2O / 23 mol O2) = 1.17 mol H2O

(b)

(17.6 mol H2O) x (12 mol HCl / 2 mol H2O) x (36.4611 g HCl/mol) = 3850 g HCl

(c)

(90.4 g HCl) / (36.4611 g HCl/mol) x (24 mol CO2 / 12 mol HCl) = 4.96 mol CO2

(d)

(106.01 g CO2) / (44.00964 g CO2/mol) x (2 mol C12H4Cl6 / 24 mol CO2) x (360.8782 g C12H4Cl6/mol) =

72.4 g C12H4Cl6

(e)

(4.2 kg C12H4Cl6) / (360.8782 g C12H4Cl6/mol) x (12 mol HCl / 2 mol C12H4Cl6) x (36.4611 g HCl/mol) =

2.5 kg HCl