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?

The following reaction shows sodium carbonate reacting with calcium hydroxide. na2co3 + ca(oh)2 → naoh + caco3 how many grams of naoh are produced from 20.0 grams of na2co3? (molar mass of na = 22.989 g/mol, c = 12.01 g/mol, o = 15.999 g/mol, ca = 40.078 g/mol, h = 1.008 g/mol) 12.2 grams 15.1 grams 24.4 grams 30.2 grams