Mole Ratios / Balancing Equations
Balance the following equation:
"KClO3 ---> KCl + O2"
2KClO3 ---> 2KCl + 3O2
The meaning of BCA
What is Before, Change, and After
the theoretical yield of carbon dioxide if 15.0 g of methane reacts with excess oxygen to produce 20.0 g of carbon dioxide.
What is 41.14 g of CO2 ?
The percent yield of a reaction should produce 10 grams of product but only 7 are produced?
What is 70% ?
The amount of heat required to raise the temperature of 20.0 g of water from 25° to 85° if the specific heat of the water is 4.184 J/g°C
What is 5020.8 J ?
Balance the following equation:
"Fe + HCl ---> FeCl + H2"
Fe + 2HCl ---> FeCl2 + H2
The definition of a limiting reactant
What is the substance that is totally consumed when the chemical reaction is complete.
the theoretical yield of iron chloride when 25.0 g of iron reacts with excess chlorine gas to produce iron chloride.
What is 72.60 g FeCl3 ?
The percent yield of a reaction with a theoretical yield of 15 g and an actual yield of 12 g
What is 80% ?
How much heat is needed to melt 25.0 g of ice at 0°C if the heat of fusion of the ice is 334 J/g
What is 8350 J ?
The mole ratio of the following:
"CH4 + O2 ---> CO2 + H2O"
What is 1:2 ?
The first step when approaching a BCA table problem
What is balancing the equation?
the theoretical yield of hydrogen gas if 10.0 g of aluminum reacts with excess hydrochloric acid to produce aluminum chloride and hydrogen gas.
What is 1.12 g of H2 ?
The percent yield of a reaction that was expected to produce 12 g and only produced 9 g
What is 75% ?
the final temperature of the iron if 1500 J of heat is added to a 50.0 g piece of iron at 20° C
What is 86.67°C ?
The mole ratio of the following:
"Fe + HCl ---> FeCl2 + H2
What is 2:1 ?
The meaning of excess reactant
What is the leftover reactant?
the theoretical yield of ammonia in the case of 30.0 g of nitrogen gas reacting with excess hydrogen gas to produce ammonia.
What is 36.53 g of NH3 ?
The percent yield of a reaction with the actual yield of 18 g and a theoretical yield of 25 g
What is 72% ?
The amount of heat released when 10.0 g of methane is burned in excess oxygen, given that the heat of combustion of methane is -890 kJ/mol
What is 554.47 kJ ?
Balance the following equation:
"N2 + H2 ---> NH3"
N2 + 3H2 ---> 2NH3
The limited reactant from the equation:
"Zinc metal reacts with hydrochloric acid to produce zinc chloride and hydrogen gas. A chemist reacted 12.0 g of zinc with hydrochloric acid.
What is Zinc ?
the theoretical yield of silicon carbide if 50.0 g of silicon dioxide reacts with excess carbon to produce silicon carbide and carbon monoxide.
What is 33.37 g of SiC ?
The percent yield of a reaction that should produce 40.0 g but only produces 32
What is 80% ?
The amount of heat released when 10.0 g of propane is burned in excess oxygen, given that the standard combustion for propane is -2220 kJ/mol
What is 503 kJ ?