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1. PCP is an environmental contaminant that can bioaccumulate in food chains. If the concentration of PCB in a seal is 2.00 ppm, what mass of PCP is found in a 60.0 kg seal? 8. Lithium metal reacts with nitrogen from the air to produce a black solid 6 Li(s) + N2(g) ---> 2Li3N(s) What mass of Li3N can be produced from 7.00 g of Li(s)(3 marks) 9. An orange-brown precipitate can be produced from the reaction of ammonium hydroxide with iron (III) nitrate. 3 NH4OH(aq) + Fe(NO3)3(aq) → Fe(OH)3(s) + 3 NH4NO3(aq) How many grams precipitate will form when 300 mL of 0.250 mol/L NH4OH reacts? (3 marks)
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