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OLga [1]
3 years ago
10

A chemistry student adds a quantity of an unknown solid compound X to 750. mL of distilled water at 26.° C. After 10 minutes of

stirring, all of the X has dissolved. The student then drains off the solution and evaporates the water under vacuum. A precipitate is left behind. The student washes, dries and weighs the precipitate. It weighs 0.012 kg.
Chemistry
1 answer:
Anna11 [10]3 years ago
7 0

Explanation:

The given data is as follows.

          X = 12 g,    Volume of water = 2 L,

Hence, solubility will be calculated as follows.

               \frac{12 g}{2 L}

              = 6 g/L

As we know that 1 L contains 1000 ml. Hence, the calculated solubility will be converted into g/ml as follows.

               Solubility = \frac{6 g}{1000 ml}

                               = 0.006 g/ml

Thus, we can conclude that the solubility of compound X in 26^{o}C is 0.006 g/ml.

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The molecules of a liquid substance are closely packed together to each other. So as a result, liquids are denser than gases.

<h3>What is the difference between the density of liquid and gas?</h3>

A mass of gas will have a much larger volume compared to the same mass of liquid. This is because it has a much lower density. The density of gaseous oxygen is 0.0014 g/cm3. Density is ρ=Mass Volume. We know that gas will uniformly occupy more space than liquid whatever volume is available to it. On the other hand, solids and liquids, are closely packed as compared to gas and are high-density materials where ρ is relatively constant.

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