1.4 Composition of Mixtures

A student is given two 10g samples, each a mixture of only NaCl (s) and KCl (s) but in different proportions. Which of the following pieces of information could be used to determine which mixture has the higher proportion of KCl (s)?

A 5.0 g sample of MgCl₂ may contain measurable amounts of other compounds as impurities. Which of the following quantities is (are) needed to determine the sample is pure MgCl₂

A sample of carbonate rock is a mixture of CaCO₃ and MgCO₃. The rock is analyzed in a laboratory, and the results are recorded in the table above. Which columns in the table provide all the information necessary to determine the mole ratio of Ca to Mg in the rock