Pure antimony (Sb) can be prepared by heating the antimony ore (Sb2S3) in the presence of iron as follows: Sb2S3 + 3Fe ==> 2Sb + 3FeS If 438.6 g of antimony sulfide is reacted with iron and 37.6 g of pure antimony is produced, what is the % yield for this reaction?

9.87 g of ammonia, NH3, react completely according to the reaction: 2 NH3 + CO₂ -> CN₂OH + H₂O If 13.74 g of urea (CN₂OH4) are produced what is the percent yield for this reaction?

Determine the mass of carbon dioxide gas produced (theoretical yield) when 68.0 g of lead (III) oxide is reacted with 50.0 g of C. Which reactant is the limiting reactant?

Hydrazine (N₂H4), a component of some rocket fuels, is industrially produced using the following reaction. 2 NH3 + H₂O2 → N₂H4 + 2 H₂O Molar masses (in g mol-¹) NH3 17.03 Number % H₂O₂ 34.02 N₂H4 32.05 A: What is the percent atom economy for the synthesis of hydrazine? Enter a percentage accurate to 3 significant figures. Do not enter the "%" symbol. The E-factor is greater than 1. The E-factor is less than 1. H₂O 18.02 B: What is the E-factor when a reaction between 170.3 g of NH3 and 170.1 g of H₂O₂ produces 160.3 g of N₂H4 and 90.1 g of water? The E-factor is 0.

Limestone(CaCO3) is used to remove acidic pollutants from smokestack flue gases in a sequence of decomposition-combination reactions. The limestone is heated to form lime (CaO), which reacts with sulfur dioxide to form calcium sulfite. Assuming a 63.5% yield in the overall reaction, what mass of limestone is required to remove all the sulfur dioxide formed by the combustion of 70000 kg coal that is 0.44 mass % sulfur?

Calculate the theoretical yield of MgCl2 in moles when 0.311 grams of MgO are reacted with 30.0 mL of 1.04 M HCl.  The balanced reaction is provided in the lab handout.  Do not enter units with your answer.

A sample of 108.2 g of Calcium oxide was obtained by heating 258 g of calcium carbonate. What is the percent yield for this reaction? CaCO3(s) ⟶ CaO(s) + CO2(s)

The reaction of 150. g of LiOH gives 218.4 g LiHCO3 in the reaction of  LiOH(s) + CO2(g) --> LiHCO3(s). The percent yield of LiHCO3 is 51.3% (rounded to 3SF).   True False

Determine percent yield for the reaction.    Magnesium oxide can be made by heating magnesium metal in the presence of oxygen. The balanced equation for the reaction is:2Mg(s)+O2(g)→2MgO(s)2Mg(�)+O2(�)→2MgO(�) When 10.1 g of Mg are allowed to react with 10.5 g of O2, 11.6 g of MgO are collected.

Hydrazine (N2H4), a component of some rocket fuels, is industrially produced using the following reaction. 2 NH3  +  H2O2   ⟶   N2H4   +   2 H2O What is the percent atom economy for the synthesis of hydrazine?