Many moles of Na2S2O3 are needed to react completely with 42.7 g of AgBr?
2) Given the following reaction:
___Na2S2O3 + AgBr NaBr + Na3[Ag(S2O3)2]
How many grams of NaBr that will be produced from 1.75 moles of AgBr?

the earth would become to overheated and everything alive on it will eventually die from overheating. plants will eventually die as well, water will evaporate, and it will be nothing but a hot planet without anything living on it.

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.