A) a 500-g sample of AL2(SO4)3 is reacted with 450g of Ca(OH)2 . A total of 597g of CaSO4 is produced. what is the limiting reagent in this reaction, and how many moles of excess reagent are unreacted? AL2 (SO4)3 (aq)+3Ca(OH)2 (aq)-2Al(OH)3 (s)+3CaSO4(s).
B) For each of the following substances: a) use the electronegativity to calculate the polarity of the bonds. b) Determine if the bonds are polar covalent, covalent. c) determine the shape of the molecule. d) determine if the molecule is polar or non-polar. HBr, NH3,CBr4