Question

How many grams of Fe, O, can form from 25.7 g of O, ? 4 Fe(s)+30,(g)-2 Fe,O,(s) Step 1: Show the strategy for solving this problem. grams O, -grams Fe,0 Answer Bank moles Fe,O grams Fe, O grams moles O. moles Fe grams Fe Step 2: Show the conversions required to solve this problem and calculate the grams of Fe, O, 25.7 g O2 x g Fe, O, Answer Bank I mole Fe 32.00 g O 4 moles Fe 55.85 g Fe 159.70 g Fe,O, I mole O, 3 moles O 2 moles Fe,O, I mole Fe,O,

Answer 1

The number of moles for a given chemical Substances can be defined as the ratio of its mass to that of molar mass. Number of moles - Mass Molar Mass The given chemical reaction is as follows: 4Fe(s) + 30,19) 2F03/5) The mass of Oz is given to be 2579. One needs to calculate the mass of Fe, whicha has been produced in this reaction. Firstly, the number of moles of oxygen which are present in 25-79 of oxygen are calculated as follows

Number of moles of O, - Mass Molay Mass = 25.79 32.01 gimol = 0.802 mol From the Balanced chemical equation it can be seen that 2 mol Fezo, is produced from 3 mol O₂ 3 mol O₂ → 2 mol Fezo, Imol O₂ → 2 molfe, O₂ 3 mol O2 0-802 mol O2 produces: 2 mol Fe2O3 x 0.802 mol O₂ 3 mol O₂ = 0.534 mol Fe. Og

The mass of fez O₂ produced in the given reaction can be calculated as follows: Mass of Fe, O3 = Number ol moles x molar Mass 20534 mol x 159.699)mol =85-27 g First Strategy in calculating the mass of fe og produced in this reaction is as follows: grams 0, → Moles , Moles fe, D, grams Fe₂O3