CHEM 1211 EXAM 2 STUDY GUIDE QUESTIONS ANSWERED CORRECTLY LATEST UPDATE 2026
hydroxide - Answers OH -1
nitrate - Answers NO3 -1
nitrite - Answers NO2 -1
sulfate - Answers SO4 2-
sulfite - Answers SO3 2-
hydrogen sulfate or bisulfate - Answers HSO4-
carbonate - Answers CO3 2-
hydrogen carbonate or bicarbonate - Answers HCO3 -1
phosphate - Answers PO4 3-
ammonium - Answers NH4+
What is a atomic element? - Answers Elements whose basic units are single atoms.
What is a molecular element? - Answers Elements whose basic units are multi-atom molecules,
usually diatomic molecules, two atoms bonded to form a molecule.
What is a molecular compound? - Answers Compounds whose basic units are molecules made of only
nonmetals. ex: CO2
What are ionic compounds? - Answers Compounds whose basic units are cations and anions-
compounds formed from a metal and one or more nonmetals. ex: NaCl.
N3- - Answers Nitride ion (row 5a)
P3- - Answers Phosphide ion (row 5a)
O2- - Answers Oxide ( row 6a)
S2 - Answers Sulfide (row 6a)
F- - Answers Fluoride ( row 7a)
Cl- - Answers Chloride (7a)
Br- - Answers Bromide (7a)
I- - Answers Iodide (row 7a)
binary ionic compound - Answers a compound composed of the ions of one metal element and ions
of on non-metal element, joined by ionic bonds. Can be either Tye I or Type II.
ionic compound (polyatomic ions) - Answers ions compounds that contain ions that are themselves
composed of a group of atoms with an overall charge.
Type I - Answers Metal forms only one type of cation(same charge in all its compounds)
Type II - Answers Metals forms more than one type of cation (charge varies from compound to
compound ). Transition elements. Determine the charge from the charge on the anion.
How do you know a metal cation is Type II? - Answers When its not Type I.
Naming Ionic Compounds - Answers 1. Identify it. Metal+(one or more) Non-Metal.
2. Type I or Type II?- from the periodic table.
3. Binary or Polyatomic? - count the number of atoms.
Naming Molecular Compounds - Answers 1=mono, 2=di-, 3= tri-, 4= tetra-, 5= penta, 6= hexa, 7=
repta, 8= octa.
Naming Acids - Answers If starts with H its a acid. Molecular compound. Binary Acids.
HF: (aq) hydrofluoric acid.
HCl: (aq) hydrochloric acid.
HBr: (aq) hydrobromic acid.
HI: (aq) hydroponic acid.
How many moles of Cu are in 1.48 x 10^25 Cu atoms? - Answers B. 24.6 (1.48 x 10^25 x 1mol/63.546
Cu atoms)
How many molecules of sulfur trioxide are in 78.0 grams? - Answers A. 5.87 x 10^23 ( 78.0g/80.06
mol x 6.022 x 10^23/1 mol)
What is the mass (in grams) of 1.95 moles of water? - Answers c. 35.1 (1.95 moles x 1mol/18.02
moles of water)
How many moles of fluorine are in 3.2 moles of XeF6? - Answers e. none of the above ( 3.2 moles of
XeF6 x 6mol of F/1 mol of XeF6)
A 15.5 gram sample of diphosphorus pentoxide contains how many grams of phosphorus? - Answers
C. 6.76g (15.5g x 61.94/141.94)
What is the mass percent of carbon in oxalic acid, H2C2O4? - Answers C. 26.7 (H2: 2.02 C2: 24.02 O4:
64=90.04 24.02/90.04 x 100% = 26.7%)
hydroxide - Answers OH -1
nitrate - Answers NO3 -1
nitrite - Answers NO2 -1
sulfate - Answers SO4 2-
sulfite - Answers SO3 2-
hydrogen sulfate or bisulfate - Answers HSO4-
carbonate - Answers CO3 2-
hydrogen carbonate or bicarbonate - Answers HCO3 -1
phosphate - Answers PO4 3-
ammonium - Answers NH4+
What is a atomic element? - Answers Elements whose basic units are single atoms.
What is a molecular element? - Answers Elements whose basic units are multi-atom molecules,
usually diatomic molecules, two atoms bonded to form a molecule.
What is a molecular compound? - Answers Compounds whose basic units are molecules made of only
nonmetals. ex: CO2
What are ionic compounds? - Answers Compounds whose basic units are cations and anions-
compounds formed from a metal and one or more nonmetals. ex: NaCl.
N3- - Answers Nitride ion (row 5a)
P3- - Answers Phosphide ion (row 5a)
O2- - Answers Oxide ( row 6a)
S2 - Answers Sulfide (row 6a)
F- - Answers Fluoride ( row 7a)
Cl- - Answers Chloride (7a)
Br- - Answers Bromide (7a)
I- - Answers Iodide (row 7a)
binary ionic compound - Answers a compound composed of the ions of one metal element and ions
of on non-metal element, joined by ionic bonds. Can be either Tye I or Type II.
ionic compound (polyatomic ions) - Answers ions compounds that contain ions that are themselves
composed of a group of atoms with an overall charge.
Type I - Answers Metal forms only one type of cation(same charge in all its compounds)
Type II - Answers Metals forms more than one type of cation (charge varies from compound to
compound ). Transition elements. Determine the charge from the charge on the anion.
How do you know a metal cation is Type II? - Answers When its not Type I.
Naming Ionic Compounds - Answers 1. Identify it. Metal+(one or more) Non-Metal.
2. Type I or Type II?- from the periodic table.
3. Binary or Polyatomic? - count the number of atoms.
Naming Molecular Compounds - Answers 1=mono, 2=di-, 3= tri-, 4= tetra-, 5= penta, 6= hexa, 7=
repta, 8= octa.
Naming Acids - Answers If starts with H its a acid. Molecular compound. Binary Acids.
HF: (aq) hydrofluoric acid.
HCl: (aq) hydrochloric acid.
HBr: (aq) hydrobromic acid.
HI: (aq) hydroponic acid.
How many moles of Cu are in 1.48 x 10^25 Cu atoms? - Answers B. 24.6 (1.48 x 10^25 x 1mol/63.546
Cu atoms)
How many molecules of sulfur trioxide are in 78.0 grams? - Answers A. 5.87 x 10^23 ( 78.0g/80.06
mol x 6.022 x 10^23/1 mol)
What is the mass (in grams) of 1.95 moles of water? - Answers c. 35.1 (1.95 moles x 1mol/18.02
moles of water)
How many moles of fluorine are in 3.2 moles of XeF6? - Answers e. none of the above ( 3.2 moles of
XeF6 x 6mol of F/1 mol of XeF6)
A 15.5 gram sample of diphosphorus pentoxide contains how many grams of phosphorus? - Answers
C. 6.76g (15.5g x 61.94/141.94)
What is the mass percent of carbon in oxalic acid, H2C2O4? - Answers C. 26.7 (H2: 2.02 C2: 24.02 O4:
64=90.04 24.02/90.04 x 100% = 26.7%)
