You must convert 10.0 l of nitrogen gas from a temperature of 300 k and a pressure of 203 kpa to stp. which of the following is the best law to use?
charles's law
combined gas law
boyle's law
avogadro's law

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.