Part 1
Define stoichiometry.
-A section of chemistry related to stocks
-A section of chemistry that involves reactants and/or products in a chemical reaction to determine its quantitative data.
-A section of chemistry that studies the chemistry of molecular subunits
A section of chemistry that involves reactants and/or products in a chemical reaction to determine its quantitative data.
What is a limiting reagent?
-A reactant that gets consumed first in a chemical reaction
-A reactant that binds to an element first in a chemical reaction
-A reactant that determines the quality of a chemical reaction’s product
-A reactant that gets consumed first in a chemical reaction
What is an excess reagent?
-A reactant that is not completely used up once the reaction finishes
-The waste product of an element after fractional distillation
-An element that has a higher amount of protons in a chemical reaction
A reactant that is not completely used up once the reaction finishes
What is the molar mass of Calcium chloride(CaCl2)?
110.98 g/moll
When in doubt, always change to ___
moles
1.Is this true about stoichiometry? Stoichiometry is used to determine the quality of products and reactants that are needed or produced in a reaction?
False
What is Percent Yield?
Actual/Theoretical X 100%
Maximum Product is the same as ____
Theoretical Yield
Define mole ratio.
-The ratio between the amount of moles that two compounds have in a reaction
-The ratio between the distance of moles of an element from its surroundings
-The ratio between the mass of moles that two compounds have in a reaction
The ratio between the amount of moles that two compounds have in a reaction
Which of these measurements are used in stoichiometry?
-Moles
-Mass
-Volume
-All of the above
All of the above
If you react 15 grams of Mg with 20 liters of O2, which one is the limiting reagent?
Mg
How many moles of KClO3 must decompose to make 9 moles of gaseous oxygen?
33.3 moles
Is this true? Mole ratios are found from the balanced equation of a reaction.
True
Is this true? You must convert grams to moles to do stoichiometry.
True
Which of the below is true for limiting reagents?
-It is consumed in a chemical reaction until a certain point
-It is fully consumed
-It is consumed and it turns into excess reagents as waste
It is fully consumed
How many grams of lithium nitrate will be needed to react with lead(IV) sulfate to produce 250 grams of lithium sulfate?
313.55 g
How many moles of solid aluminum are required to produce 4.5 moles of aluminum oxide?
9.0 moles
What is the molar mass of Mg(OH)2?
58.3 g/mol
From the equation N2 + 3H2 → 2HN3, how many moles of hydrogen are needed to react with 1 mole of nitrogen?
3 moles
Which of these products is NOT a product of stoichiometry?
-Soap
-Chocolate bars
-Gasoline
-None of the above
None of the above