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09.01.2021 •
Chemistry
What is the percent yield of lithium hydroxide from a reaction of 7.40 g of lithium with 10.2 g of water? The actual yield was measured to be 12.1 g.
2Li(s) + 2H2O(l) = 2LiOH(aq) + H2(g)
Select one:
a. 72.5%
b. 53.1%
c. 89.3%
d. 47.4%
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Ответ:
d. 47.4%
What is the percent yield of lithium hydroxide from a reaction of 7.40 g of lithium with 10.2 g of water? The actual yield was measured to be 12.1 g.
Ответ:
159.3 grams Al
Explanation:
1 Mol of Al = 27 grams, so:
5.9 Mol Al (27g/1mol) = 159.3 grams Al
The Mol gets canceled out, leaving the unit of grams.