Unit 7 Vocabulary - Mole and Stoichiometry

What is Molar Mass?

• The mass in grams of 1 mole of a substance, typically expressed in g/mol.

• The weight of an atom in atomic mass units (amu).

• The total mass of all atoms in a molecule divided by the number of moles.

• The mass of a substance divided by its volume.

What is a Stoichiometric Coefficient?

• A number that indicates the temperature of a reaction.

• A number in front of a compound in a balanced chemical equation that indicates the relative number of moles of that substance involved in the reaction.

• A measure of the pressure exerted by a gas in a reaction.

• A coefficient that represents the energy change in a chemical reaction.

What is a Conversion Factor?

• A method to calculate interest rates.

• A numerical factor used to multiply or divide a quantity when converting from one unit to another.

• A type of mathematical equation used in geometry.

• A technique for estimating values in statistics.

What is a Limiting Reactant?

• A reactant that is in excess and does not limit product formation.

• A reactant that is completely consumed in a chemical reaction, limiting the amount of product that can be formed.

• A catalyst that speeds up the reaction without being consumed.

• A product that is formed in excess during a chemical reaction.

What is Stoichiometry?

• Stoichiometry is the calculation of quantities in chemical reactions, based on the relationships between reactants and products in a balanced chemical equation.

• Stoichiometry is the study of the physical properties of substances.

• Stoichiometry refers to the measurement of temperature in chemical reactions.

• Stoichiometry is the analysis of the color changes in chemical reactions.

What is Dimensional Analysis?

• A method to analyze and solve problems using the units of measurements.

• A technique for measuring physical dimensions of objects.

• A way to convert units from one system to another.

• A process for estimating the size of an object without measuring.

What is Actual Yield?

• The maximum amount of product that can be produced in a reaction under ideal conditions.

• The amount of product that is actually obtained from a chemical reaction, as opposed to the theoretical yield.

• The total amount of reactants used in a chemical reaction.

• The amount of product that is lost during the reaction process.

What is Avogadro's Number?

• 6.022 x 10^23

• 3.14159 x 10^22

• 1.602 x 10^-19

• 9.109 x 10^-31

What is an Empirical Formula?

• A formula that shows the exact number of atoms of each element in a compound.

• A formula that shows the lowest whole-number ratio of elements in a compound, with subscripts reduced to their simplest form.

• A formula that represents the molecular structure of a compound.

• A formula that indicates the physical state of a compound.

What is a Mole Ratio?

• A mole ratio is the ratio between the numbers of moles of any two substances in a balanced chemical equation, derived from the coefficients in the balanced equation.

• A mole ratio is the total number of moles in a solution divided by the volume of the solution.

• A mole ratio is the ratio of the mass of a substance to its molar mass.

• A mole ratio is the ratio of the number of atoms in a molecule to the number of molecules in a sample.