The problem that follows was given by an instructor to his introductory chemistr
ID: 525145 • Letter: T
Question
The problem that follows was given by an instructor to his introductory chemistry class. He asked them to calculate the cost of a single aluminum atom in a roll of aluminum foil that he had recently purchased. The information that he provided the class was the following:
1 roll of Reynonlds Wrap Heavy Duty Aluminum foil 24.0 in wide, 500.0 ft long and 0.096 mil thick The cost $59.48
That is all the information the instructor gave the class, although there is a key piece of information missing. What information is missing?
Explanation / Answer
He didn't give information about the density of the aluminium roll, because without density one will not be able to find out the mass of roll and subsequently the number of Aluminium atoms present in the roll.
Hence density is required.
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