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Problem: In molten salt nuclear reactors, the fuel is dissolved as fluoride compounds. One of the ideas being investigated is to use these reactors as “breeder” reactors, which make more nuclear fuel as an isotope of uranium. The uranium is produced as UF4, but a small amount of UF3 to prevent corrosion which leaches chromium from the walls of the reactor. For this reason, the properties of UF3 compound are currently being investigated (Inorg. Chem., 2011, 50, 10102–10106).  UF3 can be prepared from UF4 according to the following reaction:  3UF4 + Al → 3UF3 + AlF3 Supposed you started with 35 g of UF4 and 3.5 g of Al.  What is the limiting reagent? And what is the amount of UF3 that can be formed in grams?

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In molten salt nuclear reactors, the fuel is dissolved as fluoride compounds. One of the ideas being investigated is to use these reactors as “breeder” reactors, which make more nuclear fuel as an isotope of uranium. The uranium is produced as UF4, but a small amount of UF3 to prevent corrosion which leaches chromium from the walls of the reactor. For this reason, the properties of UF3 compound are currently being investigated (Inorg. Chem., 2011, 50, 10102–10106). 

UF3 can be prepared from UF4 according to the following reaction: 

3UF4 + Al → 3UF3 + AlF3

Supposed you started with 35 g of UF4 and 3.5 g of Al. 

What is the limiting reagent? And what is the amount of UF3 that can be formed in grams?

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