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Chemical Formulas and Compounds CH 7 Review

Total questions: 70

Worksheet time: 2hrs 7mins

Name
Class
Date
1.

Name for NaH

a)

sodium hydrogen

b)

potassium hydride

c)

sodium hydride

d)

potassium hydrogen

2.

Formula for barium sulfide

a)

B2S3

b)

BaS

c)

Ba2S

d)

BaS2

3.

Name for Hg2S

a)

mercury (IV) sulfide

b)

mercury (III) sulfide

c)

mercury (II) sulfide

d)

mercury (I) sulfide

4.

Formula for lead (II) chloride

a)

PbCl2

b)

Pb2Cl

c)

Pb2Cl3

d)

Pb3Cl2

5.

Name for PBr2

a)

phosphorus bromide

b)

phosphorus dibromide

c)

phosphorus dibromine

d)

phosphorus bromine

6.

Formula for Disilicon Heptasulfide

a)

SiS6

b)

SiS7

c)

Si2S6

d)

Si2S7

7.

Name for LiOH

a)

lithium hydrogen oxide

b)

lithium hydroxide

c)

lithium (II) hydroxide

d)

lithium (I) hydroxide

8.

Formula for iron (II) carbonate

a)

FeCO3

b)

Fe2CO3

c)

FeCO2

d)

Fe2CO2

9.

Name for H3P

a)

Trihydrogen phosphoride

b)

Trihydrophosphoric acid

c)

Hydrophosphoric acid

d)

Hydrogen phosphoride

10.

Formula for Carbonic acid

a)

H2CO3

b)

H2C2O4

c)

H2CO2

d)

HC2O4

11.

Oxidation # for underlined particle:

Li2SiO3

a)

(I)

b)

(II)

c)

(III)

d)

(IV)

12.

Name for SrBr2

a)

strontium bromine

b)

strontium bromide

c)

strontium dibromide

d)

strontium dibromine

13.

Name for Ge4C3

a)

Germanium (III) carbide

b)

Germanium (IV) carbide

c)

Germanium carbide

d)

Germanium carbine

14.

Formula for Cobalt (II) bromide

a)

CoBr

b)

Co2Br2

c)

Co2Br

d)

CoBr2

15.

Formula for sulfur dioxide

a)

S2O

b)

SO2

c)

S2O2

d)

(SO)2

16.

Name for CO

a)

carbon monoxide

b)

carbon oxide

c)

monocarbon oxide

d)

carbide monoxide

17.

Formula for aluminum phosphate

a)

Al2P3

b)

Al3PO4

c)

AlP

d)

AlPO4

18.

Name for BaO

a)

Barium oxide

b)

Barium monoxide

c)

Monobarium oxide

d)

Monobarium monoxide

19.

Formula for Perchloric acid

a)

HCl2O4

b)

HCl4

c)

HClO

d)

HClO4

20.
What is the correct formula for the compound, lithium oxide?
a)
LiO
b)
Li2O
c)
LiO2
d)
Li2O2
21.
What is the name of Al(NO3)3?
a)
Aluminum trinitrate
b)
Monoaluminum nitrate
c)
Aluminum (III) nitrate
d)
Aluminum Nitrate
22.
What is the name of N2O3
a)
Nitrogen trioxide
b)
Dinitrogen oxide
c)
Dinitrogen trioxide
d)
Nitrogen oxide
23.
What is the name of C3Cl8 ?
a)
Carbon octachloride
b)
Tricarbon octachloride
c)
Carbon trichloride
d)
Octacarbon trichloride
24.
Ca3N2
a)
calcium nitrogen
b)
carbon nitrogen
c)
calcium nitride
d)
carbon nitrate
25.
sodium carbonate
a)
NaHCO3
b)
Na2CO3
c)
NaCO3
d)
Na4C
26.
xenon tetrafluoride
a)
XeF4
b)
XeF
c)
Xe4F
d)
XeFO4
27.
Determine  if Silicon Dioxide is Ionic or covalent
a)
Ionic
b)
Covalent
28.
Which of the following is the correct name for PbCl4?  
a)
Lead Chloride
b)
Lead (I) Chloride
c)
Lead (IV) Chloride
29.
Which of the following is the correct name for FeO?  
a)
Iron oxide
b)
Iron (I) oxide
c)
Iron (II) oxide
30.
diphosphorus pentoxide
a)
P2O5
b)
PO5
c)
P5O2
d)
P2O6
31.
What is the formula for Hexaboron Monosilicide
a)
B6Si
b)
BSi
c)
BSi6
d)
B6Si6
32.
What is the oxidation number of Fe in FeO?
a)
+1
b)
-1
c)
+2
d)
-2
33.
What is the oxidation number of O in CO2?
a)
+2
b)
-1
c)
+4
d)
-2
34.
What is the oxidation number of N in NO21- ?
a)
-3
b)
+4
c)
-2
d)
+3
35.
The sum of all oxidation numbers in a neutral compound is ___.
a)
0
b)
1
c)
-1
d)
depends on the compound
36.
What is the oxidation of C in CH4?
a)
-4
b)
-1
c)
+4
d)
+1
37.
What is oxidation number of Mn in MnO2 ?
a)
0
b)
+2
c)
-2
d)
+4
38.
What is the oxidation number of Ca in Ca3N2?
a)
+3
b)
+2
c)
-3
d)
-2
39.

Oxidation number of O in the compound H2O2:

a)

0

b)

-1

c)

-2

d)

+2

40.

Oxidation number of H in NaH:

a)

0

b)

+1

c)

-1

d)

+2

41.

What is the oxidation state of H in H2?

a)

+2

b)

+1

c)

0

d)

None of the above

42.

What is the oxidation state of Cu in Cu2+?

a)

-1

b)

-2

c)

+2

d)

0

43.

What is the oxidation number of H in H2O?

a)

-1

b)

+1

c)

+2

d)

-2

44.

What percentage of the total atomic mass of carbon monoxide (CO) is composed of carbon?

a)

29%

b)

43%

c)

57%

d)

73%

45.
What is the percent by mass of magnesium in MgO?
a)
20%
b)
40%
c)
50%
d)
60%
46.
What is the percent by mass of fluorine in CaF2 (gram-formula mass = 78 g/mol)?
a)
24%
b)
49%
c)
51%
d)
65%
47.
What is the percent composition by mass of sulfur in the compound MgSO4 (gram formula mass = 120 g/mol)?
a)
20%
b)
27%
c)
46%
d)
53%
48.
What is the percent composition by mass of oxygen in the compound MgSO4 (gram formula mass = 120 g/mol)?
a)
20%
b)
27%
c)
46%
d)
53%
49.
Find the percent composition of Cu2S?
a)
%Cu= 67.987 %S= 32.013
b)
%Cu= 79.854   %S= 20.145
c)
%Cu= 35.946   %S= 64.054
50.
What is the percent composition of Benzene, C6H6?
a)
C = 50%
H = 50%
b)
C = 85.7 %
H = 14.3%
c)
C = 92.2%
H = 7.8%
d)
C = 71.9%
H = 28.1%
51.
What is the empirical formula for the following:
Pb5Cr5O20
a)
Pb2Cr2O10
b)
PbCr2O7
c)
Pb9Cr4O2
d)
PbCrO4
52.
Which pair has the same empirical formula?
a)
NaCrO4 and Na2Cr2O7
b)
C2H4O2 and C6H12O6
c)
C3H6O3 and C2H6O2
d)
CH4 and C2H6
53.
What is the molar mass of PbSO4
a)
303.3 g/mol
b)
294.7g/mol
c)
163.8g/mol
d)
372g/mol
54.
In which compound is the percent composition by mass of Cl equal to 42%?
a)
HClO (gram formula mass = 52 g/mol)
b)
HClO2 (gram formula mass = 68 g/mol)
c)
HClO3 (gram formula mass = 84 g/mol)
d)
HClO4 (gram formula mass = 100 g/mol)
55.
An empirical formula:
a)
is a formula that calculates the coefficients of a compound in a balanced equation.
b)
is the simplest whole-number ratio of moles of elements in the compound.
56.
What is the empirical formula of the following molecular formula:  C3H6
a)
C3H6
b)
CH2
c)
C2H4
d)
CH3
57.
What is the empirical formula if you have 88.80% copper and 11.20% oxygen?
a)
Cu3O8
b)
CuO4
c)
Cu2O
d)
Cu4O10
58.

A compound consists of 72.2% magnesium(Mg) and 27.8% nitrogen(N) by mass. What is the empirical formula?

a)

Mg4N3

b)

MgN2

c)

Mg3N2

d)

MgN

59.

You are given the following percentages: 40.05% S and 59.95% O. Find the empirical formula for these elements so that you can give the correct name of the compound formed.

a)

Sulfur monoxide

b)

Sulfur dioxide

c)

Sulfur trioxide

d)

Sulfur tetroxide

60.
A compound consists of 72.2% magnesium(Mg) and 27.8% nitrogen(N) by mass. What is the empirical formula?
a)
Mg4N3
b)
MgN2
c)
Mg3N2 
d)
MgN
61.
You are given the following percentages: 40.05% S and 59.95% O. Find the empirical formula for these elements.
a)
SO
b)
SO2
c)
SO3
d)
SO4
62.
A compound consists of 72.2% magnesium(Mg) and 27.8% nitrogen(N) by mass. What is the empirical formula?
a)
Mg4N3
b)
MgN2
c)
Mg3N2 
d)
MgN
63.
Given the following: 42.07% Na, 18.89% P, and 39.04% O, determine the empirical formula.
a)
 NaPO2
b)
Na2PO3
c)
Na3PO4
d)
NaPO4
64.

A sample contains 36.95 g of mercury (Hg) and 13.05 g of chlorine (Cl). What is the empirical formula for this compound?

a)

HgCl2

b)

Hg3Cl

c)

Hg17Cl36

d)

HgCl

65.
What is the molecular formula if the empirical formula is CH2O and the molecular molar mass is 180.18?
a)
CH2O
b)
C2H4O2
c)
C4H8O4
d)
C6H12O6
66.
What is the molecular formula for a compound with the empirical formula: K2SO4 and a molecular mass of 696g.
a)
K2SO4 
b)
K8SO16
c)
K8S4O8 
d)
K8S4O16 
67.
EF = CF2 
Molecular formula mass = 192
MF =
a)
C4F8
b)
C4F
c)
CF8
d)
C2F4
68.

Glycerol has a molar mass of 92.09g/mol. Its percent composition is: 39.12% C, 8.75% H, and 51.12% O. What is the empirical formula for glycerol?

a)
C2H3O2
b)
CH2O
c)
C2H4O2
d)
C3H8O3
69.
A chemical formula that shows the actual # and kinds of atoms present in one molecule of a compound is called_________
a)
ionic formula
b)
covalent formula
c)
empirical formula
d)
molecular formula
70.

Name the compound: (NH4)2S

a)

ammonium sulfide

b)

nitrogen tetrahydrogen sulfide

c)

diammounium sulfate

d)

ammonium sulfate

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