1) on combustion, 1 mole of an alkane gives 2 moles of carbon dioxide and 3 moles of water. suggest the molecular formula of this alkane
2)the hydrocarbon, dedocane, is used to make detergents. it is alkane and has the molecular formula cxh26. what is the value of x?

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.