Question

Calculate the number of grams of Al in 371 gr of Al2O3

Answer 1

Answer:

Mass of Al2O3 = 371 g. Molar mass of Al = 26.981 g/mol. Molar mass of Al2O3 = 101.96 g/mol.

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Answer 2

Given: 371 grams of Al2O3

To find: Grams of Aluminium in 371 grams of Al2O3

Explanation: Given mass of Al2O3= 371 g

Molar mass of Al2O3= 2 * Molar mass of Al + 3* Molar mass of O

=> Molar mass of Al2O3= 2*27+3*16

= 102 g/ mol

Moles of Al2O3= Given mass/ Molar mass

= 371/102

= 3.63 moles

Number of atoms of Al in Al2O3= 2

Therefore, molar mass in 1 mole of Al2O3= 2*27

= 54 g

Mass of Al in 3.63 moles of Al2O3

= 3.63*54

= 196.4 g

Therefore the mass of Al in 371 g of Al2O3 is 196.4 grams.