Once the entire liquid evaporated all that was left

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Once the entire liquid evaporated, all that was left was a solid substance at the bottom the the beaker.
Data Analysis 2. Calculate and record the following quantities.
the water (g) 0g b mass of NaCl obtained after boiling away the water (g) 2.62g 3. 4. The amount of sodium chloride in the original mixture can be determined indirectly by subtracting the masses of ammonium chloride and sand from the initial mass of the powdered mixture. Calculate the percent difference between the results from the two methods using the following equation: % difference = |(measured mass) − (mass by subtraction)| / (mass by subtraction) × 100% The amount of sodium chloride cn be found in the original mixture by subtracting the mass of NH4Cl (1.222g) and SiO2 (6.158g) from theoriginal 10g which leaves me with 2.62g for the NaCl. When the NaCl was measured on the scale, it's mass was 87.620g with beaker meaning the NaCl alone weighed 2.62g. If used in the equations, the formula would show a difference of 0%. Conclusions 1. How is this lab using the difference in the physical properties of the powdered mixture components to separate them?
2. Suppose a student is given 5.375 g of a powdered mixture to separate. Because the mixture contains iron shavings, he decides to separate them using a magnet. He obtains 1.824 g of iron. What is the mass percent of iron in the mixture?
3. How could the setup in the figure above be used to recollect the water added in experiment 3?

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