Answer to Question #327334 in General Chemistry for deniz

Question

5.8 g of an inorganic metal oxide ore mainly contains 90% of Nickel (III) oxide which decomposes to elemental nickel and oxygen gas. Produced 880 mL of oxygen were collected over water at a temperature of 25°C with a total pressure of 747 mmHg. *****What is the percent yield of decomposition reaction?***** (PH20:23.7 mmHg at 25°C)

Answer 1

m₁(Ni₂O₃)=m(inorganic metal oxide)*90%

m₁(Ni₂O₃)=5.8g * 0.90 = 5.22g

2Ni₂O₃ = 4Ni + 3O₂

m₂(Ni₂O₃) = (V(O₂)*2Mr(Ni₂O₃)) / 3V_m(O₂)

m₂(Ni₂O₃) =( 0.880 * (2*166)) / 3*22.4 = 4.35g

percent yield = (m₂/m₁)*100% = (4.35/5.22)*100% = 83.33%