NAME____________________
Exam 3 FS12 CHEM 1310 Blue
MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers
the question.
1) Element M reacts with fluorine to form an ionic compound with the formula MF 3. The M+ ion
has 18 electrons. Element M is
A)P
.JSc .
B)Cr
O)Ar
E)Ca
2) Magnesium and sulfur form an ionic compound with the formula _ _
A) Mg 2S
B) MgS2
9 MgS
0) Mg 2S2
E) Mg 2S3
3) Which one of the following is the correct name for Mg(CI03h?
A) magnesium chloroxide
B) magnesium perchlorate
e!)n agnesium chlorate
0) manganese chlorate
E) manganese perchlorate
4) The name of the binary compound N 2 0 4 is _ _ A
initrogen tetroxide
B) oxygen nitride
C) nitrous oxide
0) nitrogen(llI) oxide
E) nitrogen oxide 5) The name ofthe ionic compound KBr04 is _ _
A) potassium bromate
B) potassium hypobromate
~otassium perbromate
C) potassium bromide
E) potassium perbromite
6) Calculate the percentage by mass of chlorine in PtCI 2(NH 3h. (!P23 .63
B) 12.53
C) 18.09
0) 11.82
E) 25.05 7) One million argon atoms is _ _mol of argon atoms. ~1.7
x 10.18
B) 1.0
X
10+6
C) 1.0 X 10.6
0) 3
E) 6.0
X
10
23 8) How many grams 9f hydrogen are in 46 g of CH 40? A) 184
' B 5 .8
C) 0.36
E) 2.8 0) 1.5
9) Lithium and nitrogen react in a combination reaction to produce lithium nitride:
6 Li
(s)
+ N2 (g) -7 2 Li3N
(s)
In a particular experiment, 3.50-g samples of each reagent are reacted. The theoretical yield of
lithium
,... itride is ___g.
A) S.85
~
B) 8.7
C) 2.93
0) 17.6
E) 3.52 10) Calcium oxide reacts with water in a combination reaction to produce calcium hydroxide:
CaO (s) + H2 0 (I) -7 Ca(OHh (s)
In a particular experiment, a 5.00-g sample of CaO is reacted with excess water and 6.11 g of
Ca(OHh is recovered. What is the percent yield in this experiment?
A)1.22
B) 122
C) 81.9
0)
2.4
E) 7.19
11) Which combination will produce a precipitate? A) NaOH (aq) and HCI (aq) B} NaC 2H30 2 (aq) and HCI (aq) C
OH (aq) and Mg(N0 3 h (aq) 0) NaOH (aq) and HCI (aq) E) AgN0 3 (aq) and Ca(C 2 H3 0 2 h (aq) 12) HN0 2 is a _ _.
~eak acid
B) weak base
C) strong acid
0) strong base E) binary co mpound
13) Which of the following are strong acids?
1) HI 2) HN03 3) HF 4) HBr
(A )) 1,2,4
B) 2,4
C) 1, 3,4
0)2,3,4
E) 1,2,3,4
14) In which species does sulfur have the highest oxidation number?
~
)~ 8 (elemental form of sulfur) B) H2S0 3
C) 50 2
0)H 2S
15) Oxidation and _ _mean essentially the same thing.
( A) orrosion
B) metathesis
C) reduction
0) activity
E) decomposition
16) Which one of the following is a correct expression for molarity?
A) mol solute/dL solution
B) Ilmol solute / L solution
L~ ol
solute/mL solvent Jt mol solute/mL solution G)
E) mol solute/kg solvent 17) What is the concentration (M) of sodium ions in 4.57 L of a 0.847 M Na3P solution?
A) 0.282
11) .54
C) 0.847
0) 0.185
E) 3.87
18) How many grams of H3P04 are in 175 mL of a 3.5 M solution of H3P0 4 ?
A) 20
~B»60
C) 612
0) 4.9
E) 0.61
19) Calculate the concentration (M) of sodium ions in a solution made by diluting 50.0 mL of a
0.874 M solution of sodium sulfide to a total volume of 250.0 mL.
A) 0.175
B) 0.874
C) 0.525
D) 4 .37
20} What is the molarity (M) of an aqueous solution containing 22.5 g of sucrose (CI2H22011) in
35.5 mL of solution?
A) 0.0657
!!)
.85
C) 3.52
D) 0.104
E) 1.85
D) oxygen
E) acid
X 10' 3
21} Oxidation cannot occur with out_
-
A).,Peduction
B) water
C) air
22} Magnesium bums in air with a dazzling brilliance to produce magnesium oxide:
2 Mg (s) + O2 (g) -7 2 MgO (s)
When 4 .00 g of magnesium bums, the theoretical ~ of magnesium oxide is _g.
A) 4.00
B) 13.3
C) 3.32
~ ,6.63
E) 0.165