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Stoichiometry
Limiting Reagent
% Yield
Potpourri
100
________ and _________ are conserved in every chemical reaction.
Mass and atoms
100
The reagent that is not completely used up in a reaction is called the _________________.
excess reagent
100
The maximum amount of product that could be formed from given amounts of reactants is the _____________________.
theoretical yield
100
A _________________ is a conversion factor derived from the coefficients of a balanced chemical equation.
mole ratio
200
How many moles of CaC2 are needed to react completely with 49.0 g H2O? CaC2 + 2H2O --> C2H2 + Ca(OH)2
1.36 mol CaC2
200
The reagent that determines the amount of product in a reaction is called the _________________.
Limiting reagent
200
The amount of product that forms in the lab is referred to as the ___________________ yield.
actual yield
200
How many moles of Al2O3 are formed when 0.78 mol O2 reacts with aluminum? 4Al + 3 O2 --> 2Al2O3
0.52 mol
300
How many liters of oxygen are required to burn 3.86 L of carbon monoxide? 2CO + O2 --> 2CO2
1.93 L O2
300
Identify the limiting reagent if 1.90 mol C2H4 reacts with 5.30 mol of O2. C2H4 + 3O2 --> 2CO2 + 2H2O
O2
300
The theoretical yeild of a reaction was 6.60 grams of product. If the % yield was 70.5%, what was the actual yield of product formed?
4.65 g
300
How many liters of phoshine are formed when 0.42 L of hydrogen reacts with phosphorus? P4 + 6H2 --> 4PH3 (phosphine)
0.28 L PH3
400
How many grams of nitrogen dioxide must react with water to produce 5.00 x 10^22 molecules of nitrogen monoxide? 3NO2 + H2O --> 2HNO3 + NO
11.5 g NO2
400
In the reaction, 2Al + 3Cl2 --> 2 AlCl3, identify the limiting reagent when 3.0 g Al reacts with 10.3 g Cl2.
chlorine
400
If 15.0 g of nitrogen reacts with 15.0 g of hydrogen, 10.5 grams of ammonia is produced. What is the % yield of this reaction?
57.7%
400
How many grams of NaCl are needed to make a 250 ml sample of a 2.2 Molar solution?
32.2 g
500
Calculate the Liters of Oxygen produced when 24 grams of KClO3 decomposes. 2KClO3 --> 2KCl + 3O2
6.58 L O2
500
Identify the limiting reagent when 1.0 kg N2H4 reacts with 1.0 kg O2 in the following equation. N2H4 + O2 --> N2 + 2H2O
There is no limiting reagent
500
During photosynthesis, 16.5 grams of water reacts with excess carbon dioxide. What is the % yield if 19.4 grams of glucose is produced?
70.5%
500
How many grams of glucose (C6H12O6) are needed to make a 150 ml sample of a 1.5 Molar solution.
40.5 g