Bonding and Balancing Test Review Answers
Ms. Pollock
Chemistry 1
2015
Write the names of the following chemical compounds:
1) Fe(CN)3 iron (III) cyanide
2) K4C potassium carbide
3) AuF3 gold (III) fluoride
4) N2O dinitrogen monoxide
5) Ag3N gold (III) nitride
6) CF4 carbon tetrafluoride
7) MgI2 magnesium iodide
8) NiO2 nickel (IV) oxide
9) P2S5 diphosphorus pentasulfide
10) SnSe2 tin (IV) selenide
Write the formulas of the following chemical compounds:
11) tricarbon octafluoride C3F8
12) lithium acetate LiC2H3O2
13) iron (II) arsenide Fe3As2
14) titanium (IV) acetate Ti(C2H3O2)4
15) gallium sulfide Ga2S3
16) ammonium carbide (NH4)4C
17) ruthenium (II) nitrate Ru(NO3)2
18) copper (I) oxide Cu2O
19) potassium hydroxide KOH
20) sodium phosphate Na3PO4
Identify the type of bond in each combination of elements.
21) sodium and fluorine ionic
22) silicon and carbon covalent
23) calcium and hydroxide ionic
24) xenon and fluorine
covalent
25) nitrogen and hydrogen covalent
Identify the molecular geometry of the central atom in each of the following compounds.
26) SiCl4 tetrahedral
27) NO3 - trigonal planar
28) PBr5 trigonal bipyramidal
29) IF3 t-shaped
30) SO42- seesaw
Classify each reaction as synthesis, decomposition, single replacement, double replacement or
combustion. The equations are not balanced.
1.
PbCl2 + AgNO3
2.
NH3 + HCl
3.
AlCl3 + Na2SO4
4.
Zn + S
5.
Al2(SO4)3 + BaCl2
6.
Al2S3
7.
H2SO4 + Fe
8.
Pb(NO3)2 + AgCl
NH4Cl
synthesis/composition
Al2(SO4)3 + NaCl
ZnS
double replacement
synthesis/composition
BaSO4 + AlCl3
Al + S
C12H22O11
double replacement
double replacement
decomposition
H2 + FeSO4
+ O2
CO2 + H2O
single replacement
combustion
Balance each of the following equations.
9.
Mg(OH)2 + H2SO4
10.
2 NaOH
11.
C4H12 + 7 O2
12.
4 Fe +
13.
Mg3(PO4)2
14.
NH4NO3
15.
Cl2 + 2 KBr
+
MgSO4 + 2 H2O
CuSO4
Na2SO4 + Cu(OH)2
6 H2O + 4 CO2
3 O2
+ 3 H2
2 Fe2O3
3 Mg + 2 H3PO4
N2O + 2 H2O
2 KCl + Br2
Find the percent compositions of all of the elements in the following compounds:
16)
CuBr2
28.45% C, 71.55% Br
17)
NaOH
57.48% Na, 40.00% O, 2.52% H
18)
(NH4)2S
41.10% N, 11.85% H, 47.04% S
19) What’s the empirical formula of a molecule containing 65.5% carbon, 5.5% hydrogen, and 29.0%
oxygen?
C3H3O
20) What’s the empirical formula of a molecule containing 18.7% lithium, 16.3% carbon, and 65.0%
oxygen?
Li2CO3
21) A component of protein is called serine. If the percent composition is as follows, what is the
empirical and molecular formula of serine?
C = 34.95 % H= 6.844 % O = 46.56 % N= 13.59 %
22) How many moles are 1.20 x 1025 atoms of phosphorous?
19.9 mol
23) How many atoms are in 0.750 moles of zinc?
4.52 X 1023 atoms
24) How many molecules are in 0.400 moles of N2O5?
2.41 X 1023 molecules
25) Find the number of moles of argon in 452 g of argon.
11.3 mol
26) Find the grams in 1.26 x 10-4 mol of HC2H3O2.
7.57 X 10-3 g
27) Find the mass in 2.6 mol of lithium bromide.
110.2 g
C3H7O3N