If 85g of NaN3 decomposes at 75°C (348K) and 2.3atm, what volume of N2 will be made? 2NaN3 → 2Na + 3N2

can you attach a picture of the lettuce? : )

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.