Monomer a and monomer b are coplymerized under various conditions. predict the composition (in mol% of a) initially formed at the start a copolymerization with an (previous data) run i: feed 99 mol% a & 1 mole% b, initial polymer: 0.5 mol % b. run ii: feed 1 mol% a & 99 mole% b, initial polymer: 2 mol % a. equimolar feed.

acid rain does not usually kill trees directly. instead, it is more likely to weaken the trees by damaging their leaves, limiting the nutrients available to them, or poisoning them with toxic substances slowly released from the soil. the main atmospheric pollutants that affect trees are nitrates and sulphates.

4d^55s^1 ( third choice)