Consider the polymerization of styrene in toluene at 60°C initiated by di-t—butylperoxide for a solution containing 0.04 mol of initiator and 2 mol of monomer per liter. The initial rates of initiation, Ri, and propagation, RP, are found to be 1.6 x 10'10 M s‘1 and 6.4 x 10‘7 M 3‘1, respectively, at 60°C. (a) Calculate fkd and kp/ktm. (b) Assuming no chain transfer, calculate the initial kinetic chain length. (c) Assuming only disproportionation and under the conditions stated, the transfer constant of styrene, CM, is 0.85 x 104. How much does this transfer affect the molecular weight of the polymer? ((1)

- calcium has greater affinity to bond with electron receptors than hydrogen does and hence, it has the ability to replace hydrogen in most of its compounds.

- lithium has 2 valence electrons in the product because it can make only 1 bond with hydrogen. beryllium has 4 valence electrons in the product because it can only make 2 bonds. it has fewer electrons than neon and can react with electron donors. each hydrogen has 2 valence electrons, the same as helium.

- the covalent bond formed between carbon and hydrogen is polar because carbon is more electronegative than hydrogen and it attracts the bonded electron pair closer to itself, thus giving hydrogen a partial positive charge.

- a hydrogen bond is a relatively weak bond that hydrogen atoms make with the electronegative atoms nitrogen, oxygen or fluorine.

so the best choice is a.) 2 calcium (ca) atoms

he would use the colour black