Honors Chemistry- Chapter 7 Homework Packet
Chemical Formulas and Names
1) Count the number of each atom and the total number of atoms in each of the
following compounds.
(a) Ca3(PO4)2
(b) Fe(MnO4)3
(c) Al(NO2)3
2) Complete the following table for names and formulas of binary ionic compounds.
If the name is provided, write the correct formula. If the formula is provided, write
the correct name.
Name
Formula
calcium sulfide
silver oxide
FeCl3
lead (II) nitride
KBr
MgI2
chromium (III) phosphide
ZnF2
3) Complete the following table for names and formulas of compounds with a
polyatomic ion. If the name is provided, write the correct formula. If the formula
is provided, write the correct name.
Name
Formula
Co(CN)3
Copper (II) hydroxide
sodium carbonate
SnSO4
Mn(NO3)2
zinc oxalate
Ca(MnO4)2
Iron (II) bicarbonate
Cd(NO2)2
4) Complete the following table for names and formulas of binary molecular
compounds. If the name is provided, write the correct formula. If the formula is
provided, write the correct name.
Name
Formula
C5Cl7
dinitrogen pentaoxide
tetraphosphorous hexafluoride
S3Br8
CI4
hexasulfur nonaphosphide
5) Complete the following table for names and formulas of compounds. The
categories are mixed. If the name is provided, write the correct formula. If the
formula is provided, write the correct name.
Name
Formula
Pb(CrO4)2
chromium (III) bicarbonate
lithium nitride
Al(ClO2)3
NiSO3
N5F9
iron (III) dichromate
SrO
barium phosphate
dioxygen hexanitride
Fe2(SO3)3
ammonium bromide
chromium (II) acetate
S2P7
NH4ClO3
manganese hydroxide
AgCN
cadmium carbonate
Li2S
6) Using your rules for oxidation states, assign oxidation states for all atoms in each
of the following ions, molecules, or atoms.
NiO2
P4O6
XeOF4
N2
CO
C6H12O6
UO22+
NaBiO3
Mg2P2O7
HSO4-
7) Determine the molar mass of the following compounds. Show your work.
(a) (NH4)2SO3
(b) Ca(OH)2
(c) Al2(CrO4)3
8) How many molecules are there in 471.6 grams of barium bicarbonate?
9) How many grams are represented by 2.183 X 1024 molecules of iron (II)
phosphate?
10) Determine the percent composition of each of the following compounds.
(a) NaOCl
(b) beryllium chloride
11) Determine the percent hydration in the following chemical hydrate. Show your
work.
CuSO4 • 5 H2O
12) What is the relationship between the empirical formula and the molecular formula
of a compound?
13) Determine the empirical formula of a compound containing 63.50% silver, 8.25%
nitrogen, and oxygen (the remainder).
14) A white powder is analyzed and found to contain 43.64% phosphorous and
56.36% oxygen. The compound has a molar mass of 283.33 g/mol. Determine
the empirical AND molecular formulas of the compound.
15) Caffeine contains 49.48% carbon, 5.15% hydrogen, 28.87% nitrogen, and
oxygen (the remainder). Its molar mass is 194.2 g/mol. Determine the empirical
AND molecular formula of caffeine.