What volume of chlorine gas, measured at STP, is necessary for the complete reaction of 5.02 g of aluminum? Molar mass: Al = 26.98 g/mol, Cl2 = 70.90 g/mol, AlCl3 = 133.34 g/mol

2 Al(s) + 3 Cl2(g) --> 2 AlCl3(s)

Which statement best describes the oxidation numbers of the atoms found in magnesium chloride? a. magnesium has a 2- oxidation number and chlorine has a 1+ oxidation number. b. magnesium has a 2- oxidation number and chlorine has a 2+ oxidation number. c. magnesium has a 2+ oxidation number and chlorine has a 1- oxidation number. d. magnesium has a 1+ oxidation number and chlorine has a 1- oxidation number.

What are the similarities of physical and chemical change ?

Which part of earth’s surface receives the most direct rays from the sun? a) equator b) ocean c) poles d) mountains