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Homework questions, need help!?
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:
(a) How many moles of water are needed to react with 13.5 mol O2?
?mol H2O
(b) How many grams of HCl are produced when 17.6 mol H2O react?
× 10 g HCl
(c)How many moles of CO2 are produced when 90.4 g HCl are produced?
?mol CO2
(d) How many grams of C12H4Cl6 are reacted when 106.01 g of CO2 are produced?Note: Use three significant digits in your answer.
? g C12H4Cl6
(e) How many grams of HCl are produced when 4.2 kg C12H4Cl6 react?
? × 10 g HCl
