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Chemistry
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18 Dec 2019

The aluminum foil is priced several times with large pencil size holes instead of pin size. a. How will this oversight in the procedure affect the mass of vapor measured, too low, too high or unaffected? b. Will the reported molar mass of the liquid be reported too low, too high or unaffected.

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Related questions

** Im not sure about the last one

When interpreting the data in an experiment, you determine that the freezing points of the (Benzoic acid/ TBA) solutions are higher than expected. As a result of this "misreading of the data" will the reported molar mass of the solute be too high, too low, or unaffected? Explain.

A student failed to clean their equipment resulting in an impurity during this experiment. The impurity is insoluble in water and was on the scoopula and therefore not in the test tube when it was tared. How will this reading affect the molar mass determination?

A) Too low. The impurity will cause the change in temperature to be larger, causing the mol solute to be too large. Since molar mass is g/mol, the molar mass will be calculated too low.

B) No affect. The impurity will cause the change in temperature to be larger, causing the mol solute to be too large. However, the grams of the solute will also be too large. Since molar mass is g/mol, the molar mass will not be affected.

C) Too high. The grams of impurity will be added to the mass of the solute. It will not cause a change in temperature since it is insoluble. Since molar mass is g/mol, the molar mass will be calculated too low.

D) No affect. The solute is insoluble and will not change the freezing point so the mol solute are unaffected. The grams of solute is also unaffected so molar mass will not be affected.

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