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Know your words (Vocabulary)
What percent is it anyway (Percent Composition)
The un-simplest form(Molecular Formulas)
Name that empirical formula
L.E.Y (Limited reactants, excess reactants, percent yield)
100
6.022x10^23
What is Avogadro's number.
100
In the compound KMnO4, what is the percentage of Mn if the percentage of K is 42.83% and the percentage of O is 25.14%?
What is 32.03%
100
What is the molecular formula of a compound with an empirical formula of C2OH4 and a molar mass of 88 grams?
What is C4O2H8
100
What’s the empirical formula of a molecule containing 65.5% carbon, 5.5% hydrogen, and 29.0% oxygen?
What is C3H3O.
100
The ratio of Fe to Fe2O3 in the reaction below is Fe2O3 + 2 Al --> 2 Fe + Al2O3
What is 2:1
200
It is defined as the mass of a given substance (chemical element or chemical compound)
What is molar mass.
200
True or false: When solving a percent composition equation, the molar mass divided by the total mass of the compound will give you the percent composition of a certain element in a compound?
True
200
What is the molecular formula of a compound with an empirical formula of C2H8N and a molar mass of 46 grams
What is C2H8N
200
The percentage composition of acetic acid is found to be 39.9% C, 6.7% H, and 53.4% O. Determine the empirical formula of acetic acid.
What is CH2O
200
If the actual yield is 40.16 grams and the theoretical yield is 59.84 grams, what is the percent yield?
What is 67.11%.
300
The amount of reactant that hinders the amount of the other reactant that can combine and the amount of product that can form in a chemical reaction.
What is a limited reactant
300
What is the percent of Al and O3 in Al2(SO4)3 ?
What is Al:16% and O:56%
300
True or false: The molecular formula can be simplified to give the correct chemical compound of a substance
What is true
300
For the following question, what are your knowns and unknowns: A compound with an empirical formula of C2OH4 and a molar mass of 88 grams per mole. What is the molecular formula?
Knowns: the empirical formula of C2OH4 and a molar mass of 88 grams. Unknowns: molecular formula
300
For the balanced equation shown below, if the reaction of 20.7 grams of CaCO3 produces 6.81 grams of CaO, what is the percent yield? CaCO3=>CaO+CO2
58.7%
400
The maximum amount of product that can be produced from a given amount of reactant.
What is the theoretical yield.
400
What is the percent compositions of (NH4)3PO4?
What is N:28%,H:8%,P:43%,O:21%.
400
Naphthalene is a carbon and hydrogen containing compound often used in moth balls. The empirical formula is C5H4 and its molar mass is 128.16g/mol. What is the the molecular formula?
What is C10H8
400
A component of protein called serine has an approximate molar mass of 100 g/mole. If the percent composition is as follows, what is the empirical and molecular formula of serine? C = 34.95 % H= 6.844 % O = 46.56 % N= 13.59 %
What is C3H7NO3 empirical formula and C3H7NO3 molecular formula
400
CHALLENGE:Explain the difference between a limiting reactant and an excess reactant.
The limiting reactant controls the amount of product that can be made and will be used up in the reaction.?The excess reactant will be left over after the reaction.
500
The substance that is not completely used up in a reaction?
What is the excess reactant.
500
You are the president of a mining company. You have a choice of buying one of two possible sources of copper: Chalcopyrite (CuFeS2) or Chalocite (Cu2S) If the mining and the extraction of copper from the ore are identical, which one would yield the greater quantity of copper?
What is Chalcocite?
500
A compound with the following composition has a molar mass of 60.10g/mol: 39.97% carbon; 13.41% hydrogen; 46.62% nitrogen. What is the molecular formula.
What is C2H8N2.
500
What is the following for a molecule containing carbon, 5.5% hydrogen, and 29.0% oxygen: 1. The percent of carbon present 2. The empirical formula
What is 65.5% Carbon and C3H3O
500
Explain why the conversion factor 3 g Mg(OH)2/6 g H2O cannot be used? ??for the following reaction:?? Mg3N2 + 6 H2O --> 3 Mg(OH)2 + 2 NH3
The coefficients from the balanced equation represent number of moles of reactants and products – NOT grams.