Chemistry Forum

Would the answer be 6 chlorine atoms? Is my math correct?

Polychlorinated biphenyls (PCBs) were once widely used industrial chemicals but were found to pose a risk to health and enviro- ment. PCBs contain only carbon, hydrogen, and chlorine. Aroclor 1254 is a PCB with mo- lar mass 360.88 g/mol. Combustion of 1.52 g of Aroclor 1254 produced 2.224 g of CO2, ...

Ok, thank you. I actually found a slight mistake in my method!

A 26.6 g sample of impure potassium nitrate (KNO3) was heated to complete decomposition according to the equation 2 KNO3(s) → 2 KNO2(s) + O2(g) . After the reaction was complete, the solid residue (consisting of KNO2 and the original impurities) had a mass of 23.1 g. Assuming that only the potassium...