20 g of s are added to 500 g of isoprene. what is the maximum fraction of crosslinks that can be obtained assuming only 19% of the crosslinking atoms are effective. b) what conditions have to be satisfied for polyisoprene to exhibit elastomeric behavior? will it be an elastomer at -10c?

Dumbledore decides to gives a surprise demonstration. he starts with a hydrate of na2co3 which has a mass of 4.31 g before heating. after he heats it he finds the mass of the anhydrous compound is found to be 3.22 g. he asks everyone in class to determine the integer x in the hydrate: na2co3·xh2o; you should do this also. round your answer to the nearest integ