When a sample of Mg(s) reacts completely with 02(g) the Mg(s) loses five moles of electrons. How many moles of electrons are gained by the O2 gas
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Ответ:
Seria el compuesto : SO₂
Explanation:
El oxigeno molecular es aquel que tiene como valencia el numero -2, en el caso del SO₂ se necesitan dos moleculas de oxigeno para que reaccione con el azufre con valencia +2 y asi equiparar los valores de valencias para que quede 0.
Es decir que el numero de valencia del azufre es +2 y el del oxigeno es -1, (por eso no es molecular)de esta manera si no multiplicamos al oxigeno por dos o no ponemos en claro que serian dos moleculas las que reaccionan el valor de la suma de las dos valencias no nos daria 0.
Entonces para poder solucionar dicho fenomeno en el espacio de abajo a la derecha se le suma un 2 al oxigeno (O₂) y asi el -1 se multiplica con el 2 dando como resultado una valencia total de -2 (para el oxigeno) que da 0 al sumarla con la +2 del azufre.