Chemistry Final Review
Formula and compound name for Ammonium Dichromate.
(NH4)2Cr2O7; molecular compound.
List 5 indications of a chemical reaction:
1.) Color Change. 2.) Formation of a precipitate. 3.) Formation of a gas. 4.) Odor change. 5.) Temperature change.
Find the mass of .882 moles of Oxygen.
14.112g
What's the molar mass of Ammonium Phosphate?
149.09g/mol
Molar Mass of Bromine Liquid
159.808g/Mol
Find the volume of .72 moles of Oxygen.
16.13L
Molar mass of water
18.02 g/mol
2Sr(s) + O2(g) = 2SrO(s); What does the "2" after Oxygen mean?
2 means there are 2 Oxygens.
2Sr(s) + O2(g) = 2SrO(s); What does the "2" before Sr mean?
2 means there are 2 Strontium.
Find the mass of 3.2 moles of Li.
22.208g
Find the mass of 3.24 moles of CF4
285.1524g
Find the volume of 57 Grams of CO2.
29.12L
Calculate the mass of .345 mol of sodium Nitrate.
29.32g
Balance the equation: Al(s) + HCl(aq) = AlCl3(aq) +H2(g)
2Al(s) + 6HCL(aq) = 2AlCl3(aq) + 3H2(g)
2Sr(s) + O2(g) = 2SrO(s); What are the reactants?
2Sr(s), O2(g)
2Sr(s) + O2(g) = 2SrO(s); What's the product?
2SrO(s)
Molar mass of Lead(II) Nitrate.
331.2g/mol
What's the molar mass of UF6?
352.02g/mol
Molar mass of Argon gas
39.948g/mol
Balance the equation: Fe(s) + O2(g) = Fe3O4(s)
3Fe(s) + 2O2(g) = Fe3O4
*You collect .756L of an unknown has at STP. You weigh the container and find that you have released 1.49g. What is the molar mass of the unknown gas?*
44.1g/mol (756/1000=.756L, .756/22.4=.0338, 1.49/0.338=44.1)
Molar mass of dinitrogen tetroxide
92.011g/mol
Empirical Formula
A chemical formula that shows the composition of a compound in terms of the relative numbers and kinds of atoms in the simplest ratio
Reactant
A chemical substance that is present at the start of a chemical reaction
Molecule
A group of atoms bonded together
Limiting Reactant
A reactant that is totally consumed during a chemical reaction, limits the extent of the reaction, and determines the amount of product.
Coefficient
A small whole number that appears in front of a formula in a balanced chemical equation.
Precipitate
A solid that forms from a solution during a chemical reaction.
Product
A substance produced in a chemical reaction
Catalyst
A substance that causes or hastens a chemical reaction; any agent that causes change
Electrolyte
A substance that is dissolved in solution and some of its molecules split or dissociate into electrically charged atoms or ions
Molar Mass
A term used to refer to the mass of a mole of any substance.
Formula and compound name of Silver Nitrate.
AgNO3; Ionic compound.
Formula and compound name for Barium Hydroxide
Ba(OH)2; Ionic compound
Balance the equation: BaCl2(aq) + Na2SO4(aq) = NaCl(aq) + BaSO4(s)
BaCl2(aq) + Na2SO4(aq) = 2NaCl + BaSO4
Formula and compound name of Barium Sulfate.
BaSO4; Ionic compound
Formula and compound name of Carbon Tetrachloride.
CCl4; Molecular compound.
Balance the equation: CH4 +O2 = CO2 +H2O
CH4 + 2O2 = CO2 + 2H2O
*A compound contains 27.3g of Carbon and 72.7g of Oxygen. What is it's empirical formula?*
CO2 (Convert to miles then divide by smallest number. Then simplify to find the mole ratio.)
Formula and compound name for Calcium Chloride.
CaCl2; Ionic compound
Name and compound of CaO
Calcium Oxide; Ionic Compound.
Name and compound of CaSO4
Calcium Sulfate, Ionic compound.
Soluble
Capable of being dissolved
Name and compound of CCl4.
Carbon Tetrachloride, Molecular Compound
Name and compound of H2CO3
Carbonic Acid, Molecular compound.
Determine the evidence that indicates a chemical reaction has taken place for hotdogs over a campfire.
Color change and temperature change.
Determine the evidence that indicates a chemical reaction has taken place for a light stick bent to activate.
Color change.
Acid
Compound that forms hydrogen ions (H+) in solution
Name and compound of CuSO4
Copper (II) Sulfate, Ionic Compound.
Name and compound of H2O
Dihydrogen Monoxide, Ionic Compound.
Name and compound of P2O5
Diphosphorous Pentaoxide, Molecular Compound.
Aqueous
Dissolved in water
Formula and compound name of Iron (III) Nitrate.
Fe(NO3)3; Ionic compound
Formula and compound name for Iron (II) Nitrate.
Fe(NO3)3; Ionic compound.
If you know the chemical formula for a compound, describe how you name it. That is, how do you decide what type of compound it is and what rules do you need to follow?
First you must determine whether the compound Is Ionic or molecular. Then you must, if it's Ionic, list the metal first in the formula. Then to end the compound name you must end it with either "-ide" if Ionic, or "-ate" if it is molecular.
Determine the evidence that indicates a chemical reaction has taken place for wood burned at a campfire.
Gas formed and color change.
Which has the largest mass: 3 mol of Magnesium, 1 mole of Glucose (C6H12O6) or 10 mol of Helium?
Glucose; 180.18g
A reaction requires o.498 mol of CuSO4. How many grams is this? How many particles?
Grams = 79.49g, Particles = 2.99
Formula and compound name for Carbonic Acid
H2CO3; Ionic Compound.
Formula and compound name for Hydrochloric Acid
HCl; Molecular Compound
If an ionic compound's name ends in "-ate", what does this tell you?
If and compound ends in "-ate" then it's made up of 3 elements, one of which is oxygen.
If an ionic compounds name ends in "-ide", what does this tell you?
If the element ends in "-ide" it means that the compound I'd made of two elements.
How do Ionic bonds and Ionic compound differ from covalent bonds and molecular?
Ionic Compounds and bonds are formed by transferring electrons and molecular compounds are a result of sharing electrons.
Name and compound of Fe2(CO3)3
Iron (III) Carbonate, Ionic Compound.
Formula and compound name for Potassium Permangante.
KMnO4; Ionic compound.
Name and compound of Pb(C2H3O2)2
Lead (IV) Acetate, Molecular Compound.
Formula and compound name of Magnesium Hydroxide
Mg(OH)2; Ionic compound.
Formula and compound name for Dinitrogen Tetraoxide
N2O4; molecular compound.
Formula and compound name for Ammonia.
NH3; Molecular compound.
Balance the equation: NH4NO3(s) = N2O(g) + H2O(g).
NH4NO3 = N2O + 2N2O
*A compound has a chemical composition of 29.1g Sodium, 40.5g Sulfur, 30.4g Oxygen. What is it's empirical formula?*
Na2S2O3
Formula and compound name for Sodium Sulfate.
Na2SO4; Ionic compound.
Determine the evidence that indicates a chemical reaction has taken place for an unused carton of milk left sitting on the counter for two weeks.
Odor and precipitate change.
Determine the evidence that indicates a chemical reaction has taken place for a slice of of bread stuck in the toaster and burns.
Odor of color change.
2Sr(s) + O2(g) = 2SrO(s); What is the physical state of Oxygen?
Oxygen is a gas.
Formula and compound name for Phosphorus Trichloride
PCl3; Molecular compound.
Formula and compound name of Lead (II) Acetate.
Pb(C2H3O2)2; Ionic compound.
Name and compound of KCN
Potassium Cyanide, Molecular Compound.
Determine the evidence that indicates a chemical reaction has taken place for an alka seltzer dropped in water.
Precipitate and gas formed.
How does the name indicates the charge of these metals?
Roman numerals indicate whether the element is positively negative.
Name and compound of NaCl
Sodium Chloride, Ionic Compound.
2Sr(s) + O2(g) = 2SrO(s); What is the physical state of Strontium?
Strontium is a solid.
Mole
The SI base unit used to measure the amount of a substance
2Sr(s) + O2(g) = 2SrO(s); what is the coefficient of Strontium Oxide?
The coefficient is 2.
Percentage Composition
The percentage by mass of each element in a compound
Excess Reactant
The reactant that is not completely used up in a chemical reaction
Stoichiometry
The relationship between the relative quantities of substances taking part in a reaction or forming a compound, typically a ratio of whole integers.
Molar Volume
The volume occupied by 1 mole of a gas at standard temperature and pressure (STP); 22.4 L
A mole of oxygen gas (O2) compared to a mole of lead (Pb). What's the same? What's different?
There are each a mole of an element, but they each have different masses.
Name the metals that can have more than one ionic charge.
Transition Metals
Explain the difference between Copper (II) Nitrate and Copper (I) Nitrate.
With Copper (I) Nitrate you only require one of the element while Copper (II) requires two. They both have different charges.
If you know the name of a compound describe how you will write the formula. That is, how do you decide what type of compound it is and what rules do you need to follow?
Write the symbols then cation and finally the anion.
Describe how to determine from the chemical formula if a compound is ionic or molecular.
You can determine that's it is an ionic compound if the chemical formula has both metal and non-metals, while you can determine a molecular compound by if it only contains non-metals.
empirical formula
a chemical formula that shows the composition of a compound in terms of the relative numbers and kinds of atoms in the simplest ratio
Molecular Compound
a compound that is composed of molecules
Monatomic Ion
a single atom with a positive or negative charge resulting from the loss or gain of one or more valence electrons
Polyatomic Ion
a tightly bound group of atoms that behaves as a unit and has a positive or negative charge
Ionic Compound
composed of positive and negative ions that are combined so that the numbers of positive and negative charges are equal
Name and compound of FeS
iron (II) sulfide, Ionic Compound.
Name and compound of Na2O
sodium Oxide, Ionic Compound.
