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17.04.2021 •
Chemistry
Silver nitrate, AgNO3 reacts with sodium
chloride, NaCl to form a precipitate of silver
chloride. Write the balanced ionic equation for
this reaction.

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Ответ:
Ag^+ (aq) + NO3^-(aq) + Na^+ (aq) +Cl^- (aq) ⇒ AgCl(s) + NaNO3(aq)
Ответ:
La respuesta correcta es e) 9, 9 y 10
Explicación:
En general, la composición de los átomos incluye electrones (carga negativa), protones (carga positiva) y neutrones (carga neutra). Además, la masa atómica se refiere al número en conjunto de neutrones y protones, mientras que el número atómico define el número de protones. Es decir que masa atómica = número de protones o número atómico más de número de electrones. Además, en un átomo de carga neutra el número de electrones y protones es neutra.
De acuerdo a esto, número de protones o número atómico + número de neutrones = masa atómica
9 (número de protones) + número de neutrones = 19 (masa atómica)
número de neutrones = 19 (masa atómica) - 9 (número de protones)
número de neutrones = 10
Además, el número de protones = número de electrones por lo que 9 protones significa que hay 9 electrones
Es decir, que el número de electrones es 9, el número protones es 9, y el número de neutrones es 10