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Exam3FSI2CHEM131O Yellow
Name_ _ _ _ _ _ _ _ _ _ __
MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.
1) 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
@
U50
2) One million argon atoms is
mol of~n atoms.
B) 1.0 x 10+ 6
'3 1.7x 10-18
A) 1.0 x 10-6
D) 4.37
E) 0.525
D) 3
E) 6.0 x 1023
3) Lithium and nitrogen react in a combination reaction to produce lithium nitride:
6Li (s) + N2 (g) -.. 2Li3N (s)
In a particular experiment, 3.50-g samples of each reagent are reacted. The theoretical yield of lithium nitride is
- - - - g.
A) 2.93
B) 8.7
19E.
85
D) 17.6
E) 3.52
4) Element M reacts with fluorine to form a.n ionic compound with the formula MF3. The M-ion has 18 electrons.
Element Mis _ _ __
~c
B)Cr
C)P
D)Ar
E)Ca
5) How many grams of H3P04 are in 175 mL of a 3.5 M solution of H3P04 ?
A) 20
B) 4.9
C) 612
@o
E) 0.61
6) The name of the ionic compound KBr04 is _ _ _----'
A) otassium perbromate
B) potassium hypobromate
C) potassium bromide
D) potassium bromate
E) potassium perbromite
7) Oxidation and _ _ _ _ mean essentially the same thing.
A) orrosion
B) metathesis
C) reduction
D) activity
E) decomposition
8) Which of the following are strong acids?
1) HI
2) HN03
3) HF
4) HBr
~
A) 3, 4
~,2,4
C) 1, 3,4
1
D) 2, 3, 4
E) 1, 2,3,4
9) What is the concentration (M) of sodium ions in 4.57 L of a 0.847 M Na3P solution?
~.54
B) 0.282
C) 0.847
D) 0.185
E) 3.87
10) Magnesium bums in air with a dazzling brilliance to produce magnesium oxide:
2Mg (s) + 02 (g)
--+
2MgO (s)
When 4.00 g of magnesium burns, the theoretical yield of magnesium~e is ____ g.
A) 4.00
B) 13.3
C) 3.32
L9J'6.63
E) 0.165
11) The name of the binary compound N204 is _ _ __
A) nitrous oxide B) oxygen nitride ~dinitrogen tetroxide D) nitrogen(III) oxide E) nitrogen oxide 12) How many grams of hydrogen are in 46 g of CH40?
~5.8
B) 184
C) 0.36
D) 1.5
E) 2.8
13) Which one of the following is the correct name for Mg(Cl03>2?
(A»magnesium chlorate
--
B) magnesium perchlorate
C) magnesium chloroxide
D) manganese chlorate
E) manganese perchlorate
14) Magnesium and sulfur form an ionic compound with the formula _ _ __ .
~gS
15) Calcium oxide reacts with water in a combination reaction to produce calcium hydroxide:
CaO (s) + H20 (1)
--+
Ca(OHh (s)
In a particular experiment, a 5.00-g sam pIe of CaO is reacted with excess water and 6.11 g of Ca(OH)2 is
recovered. What is the percent yield in this experiment?
~92.4
B) 122
C) 81.9
16) HN02 is a _ _ __
A) strong base B) weak base C) strong acid ."c-­
( J)} eak acid E) binary compound 2
D) 1.22
E) 7.19
17) In which species does sulfur have the highest oxidation number?
A) 58 (elemental form of sulfur)
~2504
C) 502 D) H25 E) H2503 18) Calculate the percentage by mass of chlorine in PtCI2(NH3h.
A) 12.53
1»23.63
C) 18.09
D) 11.82
E) 25.05
19) 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
B) 1.85 x 10-3
C) 3.52
D) 0.104
~ .85
20) Which combination will produce a precipitate?
A) NaOH (aq) and HCI (aq)
(]) KOH (aq) and Mg(N03)2 (aq)
C) NaC2H302 (aq) and HCl (aq) D) NaOH (aq) and HCI (aq) E) AgN03 (aq) and Ca(C2H302h (aq) 21) Which one of the following is a correct expression for molarity?
N
B)
mmol solute/mL solution ~mol
solute / L solution C) mol solute / roL solvent D) mol solute/L solvent E) mol solute/kg solvent 22) Oxidation cannot occur without _ _ __
A) oxygen
B) water
C) air
3
(~duction
E) acid