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 mixture contains 5.0 g of H2 and 32.0 g of O2. How many grams of H2O can be formed? (2H2 + O2 → 2H2O; Molar mass H2 = 2.0 g/mol, O2 = 32.0 g/mol, H2O = 18.0 g/mol)
A reaction has a percent yield of 80%. If the theoretical yield is 50 g, what is the actual yield?
A reaction mixture contains 0.25 mol of A and 0.40 mol of B. The balanced equation is A + 2B → C. What is the maximum number of moles of C that can be formed?
A reaction produces 15.0 g of product, but the theoretical yield is 20.0 g. What is the percent yield?
A mixture contains 5.0 g of H2 and 32.0 g of O2. How many grams of H2O can be formed? (2H2 + O2 → 2H2O; Molar mass H2 = 2.0 g/mol, O2 = 32.0 g/mol, H2O = 18.0 g/mol)
A reaction has a percent yield of 80%. If the theoretical yield is 50 g, what is the actual yield?
A reaction mixture contains 0.25 mol of A and 0.40 mol of B. The balanced equation is A + 2B → C. What is the maximum number of moles of C that can be formed?
A reaction produces 15.0 g of product, but the theoretical yield is 20.0 g. What is the percent yield?
Which law is the basis for stoichiometric calculations?
(1) Law of Conservation of Mass
(2) Law of Definite Proportions
(3) Law of Multiple Proportions
(4) Law of Constant Composition
Which of the following best defines stoichiometry?
(1) The study of the speed of chemical reactions
(2) The calculation of quantities in chemical reactions
(3) The study of acids and bases
(4) The measurement of temperature changes
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 a reason why the actual yield is less than the theoretical yield?
(1) Side reactions occur
(2) All reactants are pure
(3) The reaction goes to completion
(4) No product is lost during recovery
Fill in the blank: In stoichiometric calculations, the first step is to write a ____ chemical equation.
Fill in the blank: In the reaction 2Al + 3Cl2 → 2AlCl3, the mole ratio of Al to AlCl3 is ____:____.
Fill in the blank: The percent yield is calculated as (____ / theoretical yield) × 100%.
Fill in the blank: The reactant that determines the amount of product formed in a chemical reaction is called the ____ reactant.
True or False: In a chemical reaction, the mass of products is always equal to the mass of reactants.
True or False: The actual yield is the amount of product calculated from the balanced equation.
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 to convert between moles of any two substances in the reaction.
