Calculate the mass of hydrogen in 500 g of Al (C2H3O2) 3

Question

Malia Gillespie

Chemistry

29 July, 03:53

Calculate the mass of hydrogen in 500 g of Al (C2H3O2) 3

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Answers (2)

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Corey · Answer 1

22.2 grams For every molecule of Al (C2H3O2) 3, we have 9 atoms of hydrogen. So let's first determine how many moles of Al (C2H3O2) 3 we have. So start by looking up the atomic weights of the elements involved. Atomic weight aluminium = 26.981539 Atomic weight carbon = 12.0107 Atomic weight hydrogen = 1.00794 Atomic weight oxygen = 15.999 Molar mass Al (C2H3O2) 3 = 26.981539 + (12.0107 * 2 + 1.00794 * 3 + 15.999 * 2) * 3 = 204.111199 Moles Al (C2H3O2) 3 = 500 g / 204.111199 g/mol = 2.449645107 mol Moles H = 9 * 2.449645107 mol = 22.04680597 mol Mass H = 22.04680597 mol * 1.00794 g/mol = 22.22185761 g Rounding to 3 significant figures gives 22.2 grams.

Jaiden Holder · Answer 2

Answer is: the mass of hydrogen is 22,05 grams.

m (Al (C₂H₃O₂) ₃) = 500 g.

M (Al (C₂H₃O₂) ₃) = 27 + 6 ·12 + 9 · 1 + 6 · 16 · g/mol = 204 g/mol.

n (Al (C₂H₃O₂) ₃) = m (Al (C₂H₃O₂) ₃) : M (Al (C₂H₃O₂) ₃).

n (Al (C₂H₃O₂) ₃) = 500 g : 204 g/mol.

n (Al (C₂H₃O₂) ₃) = 2,45 mol.

n (Al (C₂H₃O₂) ₃) : n (H) = 1 : 9.

n (H) = 22,05 mol.

m (H) = 22,05 mol · 1 g/mol

m (H) = 22,05 g.