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ikadub [295]
3 years ago
14

If 36 grams of aluminum react with an excess of oxygen, as shown in the balanced chemical equation below, how many grams of alum

inum oxide can be formed? (1 point)
4Al + 3O2yields 2Al2O3

68 grams
24 grams
272 grams
18 grams
Chemistry
1 answer:
Ludmilka [50]3 years ago
5 0
Molar mass of Al = 26.98
molar mass of Al2O3 = 101.96
36 / 26.98 = 1.3343 moles Al 
set up a proportion : 1.3343 / 4 = x / 2 (let x = moles of Al2O3) 
x = 0.66716 moles of Al2O3
0.66716 * 101.96 = 69.024 g of Al2O3 
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