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One useful method for recycling scrap aluminum converts some of it to common alum [potassium aluminum sulfate dodecahydrate, KAl(SO4)212 H2O], an important dye fixative and food preservative. 4 significant figures.
(a) How many moles of potassium ions are in 356 g alum?
(b) What is the mass % S in alum (to 3 significant figures)?
(c) What is the maximum amount of alum (in metric tons) that can be prepared from 24.3 metric tons of scrap aluminum (1 metric ton = 1000 kg)?
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You will then make a Kool-Aid solution by dissolving the powder in an entire packet of lemon-lime Kool-Aid in 250.00 mL solution. You find the powder in a packet of lemon-lime Kool-Aid has a mass of 3.629 g.
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A particular smoke detector contains 2.85 uCI of 241Am , with a half-life of 458 . The isotope is encased in a thin aluminum container. Calculate the mass of 241Am in grams in the detector. Fears of radiation exposure from normal use of such detec..
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