Stoichiometry
| Description: Stoichiometry Quiz: Test Your Understanding of Chemical Reactions and Quantitative Relationships | |
| Number of Questions: 14 | |
| Created by: Aliensbrain Bot | |
| Tags: stoichiometry chemical reactions quantitative relationships chemistry |
What is the mole concept in chemistry?
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A unit used to measure the amount of a substance
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A measure of the mass of a substance
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A way to calculate the volume of a substance
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A method for determining the density of a substance
The mole concept is a fundamental concept in chemistry that defines the mole as the amount of a substance that contains as many elementary entities (atoms, molecules, ions, or other particles) as there are atoms in 0.012 kilograms of carbon-12.
What is the balanced chemical equation for the combustion of methane?
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CH₄ + 2O₂ → CO₂ + 2H₂O
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CH₄ + O₂ → CO + 2H₂
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CH₄ + 2O₂ → CO₂ + H₂O
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CH₄ + O₂ → C + 2H₂O
The balanced chemical equation for the combustion of methane is CH₄ + 2O₂ → CO₂ + 2H₂O. This equation shows that one molecule of methane reacts with two molecules of oxygen to produce one molecule of carbon dioxide and two molecules of water.
What is the molar mass of sodium chloride (NaCl)?
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58.44 g/mol
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35.45 g/mol
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22.99 g/mol
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44.01 g/mol
The molar mass of sodium chloride (NaCl) is 58.44 g/mol. This is calculated by adding the atomic masses of sodium (22.99 g/mol) and chlorine (35.45 g/mol).
What is the limiting reactant in a chemical reaction?
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The reactant that is completely consumed in the reaction
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The reactant that is present in excess
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The reactant that is present in the smallest amount
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The reactant that is present in the largest amount
The limiting reactant in a chemical reaction is the reactant that is completely consumed in the reaction. This reactant determines the maximum amount of product that can be formed.
What is the percent yield of a chemical reaction?
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The ratio of the actual yield to the theoretical yield
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The ratio of the theoretical yield to the actual yield
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The difference between the actual yield and the theoretical yield
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The sum of the actual yield and the theoretical yield
The percent yield of a chemical reaction is the ratio of the actual yield to the theoretical yield. The actual yield is the amount of product that is actually obtained from the reaction, while the theoretical yield is the maximum amount of product that could be obtained from the reaction.
What is the empirical formula of a compound?
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A formula that shows the simplest whole-number ratio of atoms in a compound
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A formula that shows the exact number of atoms in a compound
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A formula that shows the molecular weight of a compound
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A formula that shows the structural arrangement of atoms in a compound
The empirical formula of a compound is a formula that shows the simplest whole-number ratio of atoms in a compound. It does not show the exact number of atoms or the structural arrangement of atoms in the compound.
What is the molecular formula of a compound?
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A formula that shows the exact number of atoms in a molecule of a compound
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A formula that shows the simplest whole-number ratio of atoms in a compound
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A formula that shows the molecular weight of a compound
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A formula that shows the structural arrangement of atoms in a compound
The molecular formula of a compound is a formula that shows the exact number of atoms in a molecule of a compound. It shows the number of atoms of each element that are present in the molecule.
What is the difference between an atom and a molecule?
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An atom is the smallest unit of an element that retains all of its chemical properties, while a molecule is a group of atoms that are held together by chemical bonds.
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An atom is the smallest unit of an element that can exist independently, while a molecule is a group of atoms that are held together by physical bonds.
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An atom is the smallest unit of an element that can participate in a chemical reaction, while a molecule is a group of atoms that are held together by covalent bonds.
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An atom is the smallest unit of an element that can be seen with a microscope, while a molecule is a group of atoms that are held together by ionic bonds.
An atom is the smallest unit of an element that retains all of its chemical properties. A molecule is a group of atoms that are held together by chemical bonds. Molecules can be formed from atoms of the same element or from atoms of different elements.
What is the law of conservation of mass?
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Mass cannot be created or destroyed in a chemical reaction.
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Mass can be created or destroyed in a chemical reaction.
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Mass can be created but not destroyed in a chemical reaction.
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Mass can be destroyed but not created in a chemical reaction.
The law of conservation of mass states that mass cannot be created or destroyed in a chemical reaction. This means that the total mass of the reactants in a chemical reaction is equal to the total mass of the products.
What is the ideal gas law?
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PV = nRT
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PV = nRT/V
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PV = RT/n
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PV = n/RT
The ideal gas law is PV = nRT, where P is the pressure of the gas, V is the volume of the gas, n is the number of moles of the gas, R is the ideal gas constant, and T is the temperature of the gas.
What is the relationship between the molar mass and the density of a substance?
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Molar mass is directly proportional to density.
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Molar mass is inversely proportional to density.
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Molar mass is independent of density.
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Molar mass is equal to density.
Molar mass is inversely proportional to density. This means that as the molar mass of a substance increases, its density decreases.
What is the difference between a chemical equation and a balanced chemical equation?
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A chemical equation shows the reactants and products of a reaction, while a balanced chemical equation shows the reactants and products in stoichiometric proportions.
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A chemical equation shows the reactants and products of a reaction, while a balanced chemical equation shows the reactants and products in mole ratios.
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A chemical equation shows the reactants and products of a reaction, while a balanced chemical equation shows the reactants and products in mass ratios.
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A chemical equation shows the reactants and products of a reaction, while a balanced chemical equation shows the reactants and products in volume ratios.
A chemical equation shows the reactants and products of a reaction. A balanced chemical equation shows the reactants and products in stoichiometric proportions. This means that the number of atoms of each element on the reactants side of the equation is equal to the number of atoms of that element on the products side of the equation.
What is the difference between a homogeneous mixture and a heterogeneous mixture?
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A homogeneous mixture is a mixture in which the components are evenly distributed throughout the mixture, while a heterogeneous mixture is a mixture in which the components are not evenly distributed throughout the mixture.
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A homogeneous mixture is a mixture in which the components are in the same phase, while a heterogeneous mixture is a mixture in which the components are in different phases.
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A homogeneous mixture is a mixture in which the components have the same chemical composition, while a heterogeneous mixture is a mixture in which the components have different chemical compositions.
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A homogeneous mixture is a mixture in which the components have the same physical properties, while a heterogeneous mixture is a mixture in which the components have different physical properties.
A homogeneous mixture is a mixture in which the components are evenly distributed throughout the mixture. This means that you cannot see any individual components of the mixture. A heterogeneous mixture is a mixture in which the components are not evenly distributed throughout the mixture. This means that you can see individual components of the mixture.
What is the difference between a solution and a suspension?
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A solution is a homogeneous mixture, while a suspension is a heterogeneous mixture.
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A solution is a mixture in which the solute is dissolved in the solvent, while a suspension is a mixture in which the solute is suspended in the solvent.
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A solution is a mixture in which the solute is in the same phase as the solvent, while a suspension is a mixture in which the solute is in a different phase than the solvent.
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A solution is a mixture in which the solute has a smaller particle size than the solvent, while a suspension is a mixture in which the solute has a larger particle size than the solvent.
A solution is a homogeneous mixture. This means that the components of the solution are evenly distributed throughout the solution. A suspension is a heterogeneous mixture. This means that the components of the suspension are not evenly distributed throughout the suspension.