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Question

pls. indicate the solution.. 1. find the mass O produced from the decomposition of 2.55g KClO3???

2. iron is prepared in a blast furnace by reacting hematite (Fe3O4) with carbon monoxide (CO). Fe3O4 + CO(g) ----> Fe(l) + CO2(g). how much Fe can be produced by this rxn when 2.00x10^3kg Fe3O4 and 1.50x10^3 kg CO are brought together in the blast furnance.

please indicate the solution.. thanks. ;)

Answer 1

2 KClO3 = 2 KCl + 3 O2

Molar mass KClO3 = 122.548g

Molar mass O2 = 31.998g

245.096g KClO3 prodfuces 95.994g O2

2.55g KClO3 produces  2.55/245.096*95.994 = 0.9987g O2

Round off

Answer: 2.55g KClO3 produces 1.00g O2

2.)   Fe3O4 + 4 CO = 3 Fe + 4 CO2

Molar mass Fe3O4 = 231.531g

Molar mass CO = 28.01g

231.531g Fe3O4 will react with 4*28.01 = 112.04g CO

2.00*10³kg Fe3O4 will react with 2.00*10³ *112.04/231.531=967.8kg CO

The Fe3O4 is the limiting reagent.

Molar mass Fe = 55.845

231.531g Fe3O4 will produce 3*55.845 = 167.535g Fe

2.00*10³ kg Fe3O4 will produce :

2.00*10³ * 167.535/231.531 = 1,447.2kg Fe

Answer 1,447.2kg Fe