Reaction Types & Equations
Activity Series & predicting products
The Mole & Moler Mass
Percent Compostion
Empirical & Molecular formulas
100
What are the reactants and products of an equation?
The reactants are the elements/compounds that are reacting to form the products, or the new compounds.
100
The most active element is at the ____ of the activity series. What is the most active element?
At the top & Lithium.
100
What is a mole?
SI unit of concentration
100
What is percent composition?
A percentage of the total mass of the compound contributed by each element.
100
Determine the empirical formula for the following compound Na39 Cl13.
Na3 Cl
200
Which reaction type has O2 as a reactant?
Combustion
200
In the activity series a element can replace anything _____ it.
Above
200
Give the first digits of Avogadro's Number.
6.02
200
What is the formula for percent comp.?
(Mass of element/Mass of compound) x 100
200
How do you solve for the molecular formula.
Divided the molecular mass by the empirical formula mass.
300
What is the only thing you can change when balancing an equation?
Coefficients
300
Define the Activity Series.
A list of elements organized according to the ease with which elements undergo certain chemical reactions.
300
What is the mass in grams of 2.25 mol of iron(Fe)?
126g Fe
300
If a 167.0 gram sample contains 133.4 g of copper, and 33.6 g of oxygen; what is the percent comp. of each?
Cu:79.9% O:20.1%
300
Define the molecular and empirical formula?
Molecular- actual ratio of elements in a compound. Empirical- simplest whole number ratio of elements in a compound.
400
What is a diatomic element?
Elements that form molecules that consist of only two of the same type of atom.
400
Write out one of each type of reaction.
Synthesis: A+B -> AB Decomposition: AB -> A+B Single Replacement: A + BC -> AC + B Double Replacement: AB + CD -> AD + CB
400
How many molecules are in 450 grams of Na2SO4?
1.9 x 10(24)
400
Give the formula and percent comp. of iron (lll) oxide.
Fe2O3 Fe:70% O:30%
400
If the molar mass of a compound is 73.8 grams/mole, what is the molecular formula?
The Molecular formula is 1
500
What are the seven diatomic elements?
Hydrogen, Nitrogen, Oxygen, Florine, Chlorine, Bromine, and Iodine
500
Name all the 5 different types of reactions that can take place.
Synthesis, Decomposition, Single replacement, Double replacement and a combustion reaction.
500
What is the molar mass of citrate C6H5O7?
189 g/mol
500
Find the percent composition of ammonium oxalate.
N:22.6% H:6.5% C:19.4% O:51.6%
500
What is the empirical formula of a molecule containing 65.5% carbon, 5.5% hydrogen, and 29.0% oxygen?
C3H3O
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