When 81.0 g of aluminium is allowed to react with 128.0 g of oxygen gas, the mass of aluminium oxide produced in grams is______. (Nearest integer) Given : Molar mass of Al is 27.0 g mol–1 Molar mass o

Question

When 81.0 g of aluminium is allowed to react with 128.0 g of oxygen gas, the mass of aluminium oxide produced in grams is______. (Nearest integer) Given : Molar mass of Al is 27.0 g mol–1 Molar mass of O is 16.0 g mol–1

Prashant Kotian · Accepted Answer

Correct answer: .. 4Al(s) + 3O2(g)  2Al2O3(s) 81 g 128 g 81 = 3 mol 32 128 = 4 mol Mole coeff. 3 = 0.75 4 = 1.33 Al is L.R. & O2 is E.R. nAl = 3 n O = n 2O Al mol = n O = n 2O Al 2O Al n = 1.5 mol 2O Al w = 1.5 × 102 = 153 g

💡 Solution & Explanation

Practice 22,000+ questions like this