Ch. 1: Science and Measurement
Name the following elements in order: Li, Na, Mg, P, Cl, Ca
Lithium, sodium, magnesium, phosphorus, chlorine, and calcium
What makes up a cation? What makes up an anion?
Cations have more protons than electrons, giving it a net positive charge. Anions have more electrons than protons, giving it a net negative charge.
Name the following compounds and identify if they are covalent or ionic: Fe2O3 and PCl5
Iron(III) oxide and phosphorus pentachloride
Determine the oxidation state of each of the following: N, N3-, and N in NaNO3
N = 0, N3- = -3, N in NaNO3 = +5
What are the seven diatomic molecules?
H2, N2, F2, O2, I2, Cl2, Br2
In the following compound, name the cation and anion: (NH4)3PO4
Cation = NH4+ (ammonium) Anion = PO43- (phosphate)
Determine how many atoms are in the following compound and find its molar mass: (NH4)2SO3
2 N, 8 H, 1 S, 3 O, total = 14 atoms total
Molar mass = 116.14 g/mol
Balance the following chemical equation:
NH3 + O2 → NO + H2O
4NH3 + 5O2 → 4NO + 6H2O
Name the following polyatomic ions in order: NO2-, NO3-, SO32-, SO42-, ClO2-, ClO3-
Nitrite, nitrate, sulfite, sulfate, chlorite, and chlorate
Ch.3 - Empirical formula: An organic compound is analyzed and found to be carbon 51.90%, hydrogen 9.80%, and chlorine 38.30%. What is the empirical formula of this compound?
C4H9Cl
How many iron and sulfur atoms are in an object containing 0.25 mol of FeS2?
1.5 x 1023 Fe atoms and 3.0 x 1023 S atoms
For the following double-displacement chemical reaction, predict the products + write the balanced complete ionic and net ionic equations.
NH4Br(aq) + Pb(NO3)2(aq) → ?
Complete ionic: 2NH4+(aq) + 2Br-(aq) + Pb2+(aq) + 2NO3-(aq) → PbBr2(s) + 2NH4+(aq) + 2NO32-(aq)
Net ionic: Pb2+(aq) + 2Br-(aq) → PbBr2(s)