Stoichiometric Calculations Using Chemical Equations
Chemistry ⇒ Stoichiometry and Chemical Calculations
Stoichiometric Calculations Using Chemical Equations starts at 10 and continues till grade 12.
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A reaction has a percent yield of 60%. If the theoretical yield is 50.0 g, what is the actual yield?
A reaction has a theoretical yield of 25.0 g and an actual yield of 20.0 g. What is the percent yield?
A reaction produces 15.0 g of product, but the theoretical yield is 20.0 g. What is the percent yield?
A sample of 10.0 g of H2 reacts with excess O2 to form H2O. How many grams of H2O are produced? (2H2 + O2 → 2H2O; Molar mass: H2 = 2.0 g/mol, H2O = 18.0 g/mol)
A student mixes 8.0 g of H2 with 32.0 g of O2. According to the equation 2H2 + O2 → 2H2O, which reactant is in excess? (Molar mass: H2 = 2.0 g/mol, O2 = 32.0 g/mol)
A reaction has a percent yield of 60%. If the theoretical yield is 50.0 g, what is the actual yield?
A reaction produces 15.0 g of product, but the theoretical yield is 20.0 g. What is the percent yield?
A sample of 10.0 g of H2 reacts with excess O2 to form H2O. How many grams of H2O are produced? (2H2 + O2 → 2H2O; Molar mass: H2 = 2.0 g/mol, H2O = 18.0 g/mol)
A student mixes 8.0 g of H2 with 32.0 g of O2. According to the equation 2H2 + O2 → 2H2O, which reactant is in excess? (Molar mass: H2 = 2.0 g/mol, O2 = 32.0 g/mol)
Which law states that the total mass of reactants equals the total mass of products in a chemical reaction?
(1) Law of Definite Proportions
(2) Law of Conservation of Mass
(3) Law of Multiple Proportions
(4) Law of Constant Composition
Which of the following best describes a limiting reactant?
(1) The reactant that is present in excess
(2) The reactant that is completely consumed first
(3) The product formed in the greatest amount
(4) The reactant that remains after the reaction
Which of the following is NOT required to perform a stoichiometric calculation?
(1) Balanced chemical equation
(2) Molar masses of substances
(3) Temperature of the reaction
(4) Amount of at least one substance
Which of the following is the correct mole ratio for the reaction: N2 + 3H2 → 2NH3?
(1) 1:3:2
(2) 2:3:1
(3) 3:2:1
(4) 1:2:3
Fill in the blank: In a chemical reaction, the reactant that determines the amount of product formed is called the _______ reactant.
Fill in the blank: In the reaction 2Al + 3Cl2 → 2AlCl3, the mole ratio of Al to AlCl3 is _______.
Fill in the blank: The balanced equation for the combustion of methane is CH4 + 2O2 → CO2 + _______.
Fill in the blank: The percent yield is calculated as (actual yield / _______ yield) × 100%.
True or False: The actual yield is always less than or equal to the theoretical yield.
True or False: The coefficients in a balanced chemical equation represent the relative masses of reactants and products.
True or False: The coefficients in a balanced equation can be used as conversion factors in stoichiometric calculations.
