A 5.0 g sample of MgCl, may contain measurable amounts of other compounds as impurities. Which of the following quantities is
(are) needed to determine that the sample is pure MgCl2 ?
(A)The color and density of the sample
(B)The mass of Mg in the sample only
(C)The number of moles of Cl in the sample only
(D)The mass of Mg and the mass of Cl in the sample
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Ответ:
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