La combustión de la pólvora negra (pernitrato de potasio) más carbono más azufre produce sulfuro potásico más dióxido de carbono más nitrógeno gaseoso; si para cada reactivo entran 78 gr de pernitrato de potasio, 65 gr de azufre y 89 gr de carbono. Calcular: a) Escriba la reacción y balancéela

b) Reactivo límite y exceso

c) Gramos de reactivo en exceso

explanation:

metals have excess of electrons whereas non-metals have deficiency of electrons. thus, in order to gain stability metals easily donate their electrons to the non-metals.

for example, electronic configuration of sodium is and electronic configuration of phosphorous is .

when a phosphorous atom and sodium atom combine together then sodium will donate is extra one electron to the phosphorous atom. as a result there will be formation of ionic bond between sodium and phosphorous.

the reaction will be as follows.

there, are three sodium sodium atoms and each of them will donate its one extra electron to phosphorous atom. thus, the sub-shell of phosphorous gets completely filled.  

thus, we can conclude that electrons are transferred from atoms of sodium to atoms of phosphorous. this transfer makes the sodium atoms donate one electron and the phosphorous atoms to gain one electron. as a result, the sodium and phosphorus atoms strongly attract each other.

- decrease the number of plants and animals living in the water.

the electron configuration that you gave me has 16 electrons ergo it has 16 protons ergo it is the element sulfur.