Chemistry Stoichiometry Questions And Answers Graded A+

Stoichiometry - Part of chemistry that studies amount of substances that are involved in reactions Mole Ratio - Identify how many moles of product are formed from a certain amount of reactant. Molar mass - Defined as the mass of given substance divided by its amount of substance Limiting Reaction - How much of the product is produce Excess Reaction - what is left over Theoretical yield - Quantify of a product obtained from the complete conversion of the limiting reactant in chemical reaction Actual yield - The amount actually produced of a product Percent yield - Calculated to be the experimental yield divided by the throetical yield multiplied by 100% Reactant - A substance that takes part in and undergoes change during a reaction Product - Substance that is formed as the results of a chemical reaction. explain the concept of mole ratio as used in reaction stoichiometry problems - a.The concept of mole ratio in reaction stoichiometry problems are used as conversion factors from moles of a reactant to another.The ratio is also used to show the balance equation of the reaction occurring. For example, converting moles to grams.Distinguish between the theoretical yield and actual yield in stoichiometric calculation - Theoretical yield is predict amount and actual yield is the actual amount what is its role in reaction stoichiometry - The molar mass used to convert between grams and moles what is the percentage yield of a reaction - The amount over the theoretical amount multiplied by 100. why are actual yields usually less calculated theoretical yields - The actual is determined by the limited reactant What is the first thing that must be done in a stoichiometry problem? - Write a balanced equation for the reaction. How do you know which is the limiting reactant? - Find the limiting reagent by looking at the number of moles of each reactant.