Write the correct answer choice in the space provided.
1. (Ch 6.MR.051) Determine the geometry of the following molecules.
E (a) BeCl2
A. trigonal-pyramidal
B. tetrahedral C. trigonal-planar D. bent E. linear
E (b) SiCl3Br
A. tetrahedral B. linear C. bent
D. trigonal-pyramidal
E. trigonalplanar
B (c) CO2
A. tetrahedral B. bent C. trigonal-planar
D. linear E. trigonal-pyramidal
2. (ch 6.MR.052.) What types of atoms tend to form the following types of bonding?
(write the letter of all that apply in the blank to the left.)
A. metals
B. nonmetals
C. neither
A & B (a) ionic
B (b) covalent
A (c) metallic
4. (ch 6.MR.064.) Draw the Lewis structure for each of the following molecules.
(a) PCl3
(b) CCl2F2
(c) CH3NH2
5. (Ch 6.MR.066.) Draw a Lewis structure for each of the following polyatomic ions and
determine their geometries.
(a) NO2-
(b) NO3-
(c) NH4+
6. (ch 7.CR.039.) Name each of the following compounds using the Stock system.
Chromium (II) Floride (a) CrF2
Silver Nitrate (b) AgNO3
Lithium Bromide (c) LiBr
Potassium Hydroxide (d) KOH
Sodium Chloride (e) CaS
Calcium Sulfate (f) NaCl
Magnesium Oxide (g) MgO
Iron (II) Oxide (h) Fe2O3
7. (ch 7.CR.040.) What is the mass in grams of each of the following samples?
(a) 3.000 mol NaCl
175.5 g
(b) 3.000 mol H2O
51 g
(c) 4.500 mol Ca(OH)2
333 g
(d) 0.675 mol Ba(NO3)2
176 g
8. (Ch 7.MR.040.) What is the mass in grams of each of the following samples?
(a) 1.602 mol NaCl
93 g
(b) 1.726 mol H2O
31 g
(c) 2.971 mol Ca(OH)2
220 g
(d) 0.442 mol Ba(NO3)2
g
9. (ch 7.MR.041.) Determine the formula mass and molar mass of each of the following
compounds.
(a) CuCN
89.564 amu
8.564 g/mol
(b) AgI
234.772 amu
234.772 g/mol
(c) N2O4
92.01 amu
92.01 g/mol
(d) Hg2I2
654.988 amu
654.988 g/mol
10. (ch 7.MR.042.) Write the chemical formula for the following compounds.
(a) sulfur trioxide
SO3
(b) beryllium chloride
BeCl2+
(c) aluminum fluoride
AF3+
11. (ch 7.MR.045.) What is the molecular formula of the molecule that has an empirical
formula of CH2O and a molar mass of 120.12 g/mol?
1.806^23
12. (ch 7.MR.046.) Determine the percentage composition of the following compounds.
(c) C2H5COOH
(d) As2O5
(a) NaClO
(b) OF2
C
=
As = 65%
Na = 31%
O = 30%
H=
O = 35%
Cl = 47%
F = 70%
O
=
O = 22%
13. ch 7.P.027. Name each of the following ionic compounds using the Stock system.
IRON (II) OXIDE (a) FeO
SODIUM CHLORIDE (b) NaCl
CALCIUM OXIDE (c) CaO
CALCIUM SULFIDE (d) CaS
14.( ch 7.P.032.) Determine the molar mass of each of the following compounds.
(a) Mg(OH)2 58 g/mol
(b) (NH4)2Cr2O7 252 g/mol
(c) Hg2SO4 498 g/mol
(d) Ca(OH)2 74 g/mol
(e) Co(NO3)2 183 g/mol
(f) Na2SO4 142 g/mol
15. ch 7.P.033. Determine the number of moles of compound in each of the following
samples. (Hint: See Sample Problem 7-9.)
(a) 2.00 g H2O 36 mol
(b) 380.8 g Ba(OH)2 65116.8 mol
(c) 148.77 g Fe3(PO4)2 53259.66 mol
16. (ch 7.P..) Determine the percentage composition of each of the following compounds.
(Hint: See Sample Problem 7-10.)
(a) XeF4
(b) CuCN
(c) AgNO3
Xe = 37
Cu = 71
Ag = 78
F = 63
C = 13
N = 10
N = 16
O = 12
17. (ch 7.P.036.) Determine the empirical formula of a compound found to contain
63.50% silver, 8.25% nitrogen, and the remainder oxygen. (Hint: See Sample Problem 7-
12.) AgNO3
18. (ch 7.P..) Determine the empirical formula of a compound found to contain 52.11%
carbon, 13.14% hydrogen, and 34.75 % oxygen.
C2H6O
19. (ch 7.P.) Chemical analysis of citric acid shows that it contains 37.51% C, 4.20% H,
and 58.9% O. What is its empirical formula?
CHO
20. Name each of the following compounds using the Stock system.
CARBON DISULFUR (a) CS2
IRON (II) OXIDE (b) Fe2O3
ALUMINUM TRIFLOURINE (c) AlF3
SILVER IODIDE (d) AgI
LITHIUM BROMINEED (e) LiBr
IRON DROXIDE (f) Fe(OH)2
PEROXIDE (g) SO2
LITHIUM BROMINEED(h) LiBr