What is the weight of 2.50 moles of Al2O3?

102 amu
102 g
255 amu
255 g

Answer:
1mol Al: 26.98 g
1mol O: 16.00 g

2(26.98 g) + 3(16.00 g) = 101.96g in 1 mol of Al2O3
(101.96 g/mol) * (2.50 mol Al2O3) = 254.9 g
so the answer = 255 g
you just gave me a head ache.
255 grams because the molecular weight is about 101 g/n and since there are 2.5 u multiply the molecular weight and u get 255 grams
Mole Wt. of Al2O3 is 101.94 so 2.5 moles will be 254.85 g say 255 g.

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