Cho 0.62 g P tác dụng vừa đủ với m g dung dịch H2SO4 98%.Sau phản ứng hoàn toàn thu được V lít khí SO2 (đktc là sp khử duy nhất) viết pthh tính m, V

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.