Untitled document - 2023-11-15T182930.576

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49) In order to determine the limiting reactant in a particular reaction, one must know each of the following EXCEPT: A) the mass of each reactant present. B) the molar mass of each reactant present. C) the coefficient of each reactant in a balanced equation. D) the mass of each product formed. D) the mass of each product formed. 50) What is the limiting reactant for the reaction below given that you start with 2.50 grams C and 2.50 grams SiO2? Reaction: C + SiO2 → SiC + O2 A) C B) SiO2 C) SiC D) O2 E) There is no limiting reactant. B) SiO2 51) What is the limiting reactant for the reaction below given that you start with 10.0 grams of Al and 19.0 grams of O2? Reaction: 4Al + 3O2 → 2Al2O3 A) Al B) O2 C) Al2O3 D) both Al and O2 E) not enough information A) Al 52) What is the excess reactant for the reaction below given that you start with 10.0 grams of Al and 19.0 grams of O2? Reaction: 4Al + 3O2 → 2Al2O3 A) Al B) O2 C) Al2O3 D) both Al and O2 E) not enough information B) O2 53) How many moles of aluminum oxide are produced according to the reaction below given that you start with 10.0 grams of Al and 19.0 grams of O2? Reaction: 4Al + 3O2 → 2Al2O3 A) 0.396 B) 0.185 C) 0.741
D) 5.00 E) not enough information B) 0.185 54) How many grams of aluminum oxide are produced according to the reaction below given that you start with 10.0 grams of Al and 19.0 grams of O2? Reaction: 4Al + 3O2 → 2Al2O3 A) 40.4 B) 5.00 C) 0.185 D) 18.9 E) not enough information D) 18.9 55) If 16.0 grams of aluminum oxide were actually produced, what is the percent yield of the reaction below given that you start with 10.0 g of Al and 19.0 grams of O2? Reaction: 4Al + 3O2 → 2Al2O3 A) 75.0% B) 100% C) 84.7% D) 39.6% E) not enough information C) 84.7% 56) A sample of 8.5 g NH3 on oxidation produces 4.5 g of NO. Calculate the percent yield. Reaction: 4 NH3 + 5 O2 → 4 NO + 6 H2O A) 15 % B) 30% C) 60% D) 70% E) none of the above B) 30%
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