In order to amend the articles of confederation, how many votes were needed? a) 7 b) 9 c) 10 d) 13

How many grams are in 68.2 molecules of br2?

How can the number of core electrons be determined from the periodic table

4al + 3o2 → 2al2o3 what does the "3" in front of o2 stand for? a) it indicates that there are 5 oxygen atoms after you add the coefficient and the subscript. b) it indicates that that there are are total of 6 oxygen atoms all bonded together as a single molecule. c) it indicates that there are 3 oxygen molecules chemically bonded to each other in the reaction. d) it indicates that there are 3 separate oxygen molecules in the reaction.