Molar Conversions

Stoichiometry is...

• The study of reaction rates.
• Mole to mole conversions
• the quantitative relationships in a chemical reaction.
• the study of expected yields.

A limiting reactant is...

• the reactant with the least mass.
• the reactant with the least number of moles.
• the reactant that produces the most product.
• the reactant that produces the least product.

The expected or theoretical yield is...

• the amount of product predicted by stoichiometric calculations
• the amount of product actually produced in a reaction.
• the sum of the reactants masses.
• always smaller than the mass of one reactant.

Actual or empirical yield is...

• the amount of product predicted by stoichiometric calculations.
• the amount of product actually produced in a reaction.
• the sum of the reactants masses.
• always lets thats the mass of one reactant.

The coefficients in a chemical equation CANNOT be used to represent...

• moles
• mass
• volume of a gas at STP
• molecules, formula units, or atoms.

In a reaction...

• the actual yield is usually higher than the expected yield.
• the actual yield is usually equal to the expected yield.
• the actual yield is usually lower than the expected yield.
• there is no particular relationship between actual and expected yields.

In the reaction: 2 H₂ + O₂ --> 2 H₂O... what is the mole ratio of oxygen to water?

• 2:2
• 1:2
• 3:2
• 2:1

Which of the following is not a reason for the difference between expected and actual yields?

• secondary reactions
• incomplete reactions
• mass does not need to be conserved in chemical reactions.
• Material can escape as gasses or smoke.

The sum of the masses of the elements in a compound

• Formula Mass
• Molar Mass
• Mole
• Molar Volume

The formula of a compound that shows how the atoms of the compound are bonded together.

• Percent composition
• Empirical Formula
• Molecular Formula
• Structural Formula