Please help ASAP. C3H8 + 5O2 ---> 4H2O + 3CO2 1. How many moles of oxygen gas are needed to react with excess propane (C3H8) in order to form 5.32 moles of water?
2. What mass of carbon dioxide is produced from 13 grams of oxygen gas and excess propane?
3. What mass of propane is needed in order to produce 2.70 moles of water?

answer: your mm

explanation:

chemical changes occur when a substance combines with another to form a new substance, called chemical synthesis or, alternatively, chemical decomposition into two or more different substances. these processes are called chemical reactions and, in general, are not reversible except by further chemical reactions. some reactions produce heat and are called exothermic reactions and others may require heat to enable the reaction to occur, which are called endothermic reactions. understanding chemical changes is a major part of the science of chemistry.