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Answer to Question #183929 in Inorganic Chemistry for dema
Question #183929
calcuate the mass needed of Al to create 130 kg of Cr from Cr2O3
Expert's answer
Cr2O3 + 2Al = 2Cr + Al2O3
M(Cr) = 52 kg/kmol
M(Al) = 27
kg/kmol
n(Cr2O3) = 130 kg / 52 kg/kmol
= 2.5kg/mol
2n(Al) = 2n(Cr) =
2.5*27 = 67.5
= 67.5Kg
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