Atenção! Esta questão foi postada ha mais de 30 dias!
Exercício de Encontrei essa questão resolvida por regra de três, mas eu queria por fórmula.
Exercício:
Dissolvendo-se 30 g de NaCl em água, de tal forma que o volume total seja 500 mL, a concentração da solução obtida é igual a 0,513 mol/L.
a) verdadeiro
b) falso
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