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Guillermo Jackson
Chemistry
28 June, 00:08
Calculate the molar mass of al2 (cro4) 3
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Hadassah Leblanc
28 June, 00:18
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Molar mass of Al₂ (CrO₄) ₃ is the mass of one mole of Al₂ (CrO₄) ₃
one mol = weight of Al₂ (CrO₄) ₃ in g / one mol
1) We have to find the atomic mass (in a periodic talbe) of the following elements (in u)
Al=26.98 u
Cr=52 u
O=16 u
2) We calculate the atomic weight of Al₂ (CrO₄) ₃
Atomic weight (Al₂ (CrO₄) ₃) = 2 (26.98 u) + 3[ (52 u) + 4 (16 u) ]=
=53.96 u+3 (52 u+64 u) = 53.96 u+3 (116 u=53.96 u+348 u=401.96 u
3) One mole of (Al₂ (CrO₄) ₃) have 401.96 g of Al₂ (CrO₄) ₃
molar mass=401.96 g / mol
answer: 401.96 g / mol
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