Would the molar mass become high or low if water vapors condensed under the aluminum foil before the final weighing?
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To determine whether the molar mass would be high or low if water vapors condensed under the aluminum foil before the final weighing, we need to understand the concept of molar mass.
Molar mass is the mass of one mole of a substance and is usually expressed in grams per mole (g/mol). It is calculated by summing up the atomic masses of all the atoms in the chemical formula.
In this scenario, if water vapor condenses under the aluminum foil, it means that some of the water will be trapped and will increase the mass of the substance being weighed.
Since the molar mass is calculated by dividing the mass of a substance by the number of moles, an increase in mass will result in a higher molar mass. Therefore, if water vapor condenses under the aluminum foil before the final weighing, the molar mass of the substance being weighed would be high.