5. 1 - PBworks

Devillez (ld2653) – Test 1 Review – Devillez – (99998) 1

This print-out should have 133 questions. 5. 1
Multiple-choice questions may continue on
the next column or page – find all choices 003 10.0 points
before answering. All of the following are characteristic proper-
ties of phosphorus. Which one is a chemical
001 10.0 points property?

A chemist investigates the 1. The white form is soluble in liquid carbon
I) melting point disulfide, but is insoluble in water.
II) boiling point
III) flammability 2. The red form melts at about 600◦C and
of acetone, a component of fingernail polish the white form melts at 44◦C.
remover. Which is/are physical?
3. Both red phosphorus and white phospho-
1. III only rus exist in solid allotropic forms.

2. I, II and III 4. When exposed to air, white phosphorus
3. II and III only will burn spontaneously, but red phosphorus
will not.

4. I and II only 5. The red form of phosphorus is insoluble
in both water and carbon disulfide.
5. I only
004 10.0 points
6. I and III only Which of the following is an extensive physical
property?
7. II only
1. reactivity
8. None of these
2. color
002 10.0 points
3. density
Consider the statement:
4. mass
“The temperature of the land is an impor-
5. refractive index
tant factor for the ripening of oranges, be-
005 10.0 points
cause it affects the evaporation of water and Which of the following is an intensive prop-
erty?
the humidity of the surrounding air.”
1. number of moles of molecules
How many of these factors,
2. volume
temperature ripening
3. weight
evaporation humidity
4. mass
are physical properties or changes?
5. density
1. 2

2. None

3. 4

4. 3

Devillez (ld2653) – Test 1 Review – Devillez – (99998) 2

006 10.0 points I II
Which is NOT a pure substance?
III IV
1. water best characterize(s) an element?
2. chlorine
3. copper 1. III and IV only
4. brass 2. II only
3. I only
007 10.0 points 4. I and II only
Which diagram(s)
009 10.0 points
I II Which diagram(s)
best characterize(s) a compound?
III IV
best characterize(s) a mixture? I II

1. I, II and III only III IV
2. I and III only
3. III and IV only
4. IV only

008 10.0 points
Which diagram(s)
best characterize(s) an element?

1. II and III only
2. II only

Devillez (ld2653) – Test 1 Review – Devillez – (99998) 3

3. I and IV only I II

4. I only

010 10.0 points
Which diagram(s)

I II III IV
best represent(s) atoms?
III IV
best represent(s) molecules? 1. I and III only

1. II and IV only 2. I and II only
2. I only
3. I and II only 3. I only
4. I and III only
5. III only 4. II only
6. II and III only
7. Another combination 5. IV only
8. II only
9. IV only 6. III only

011 10.0 points 7. Another combination
Which diagram(s)
8. II and IV only

9. II and III only

012 10.0 points
Which of the following statements concerning
substances is NOT true?

1. A pure substance can only be a homoge-
neous solution.

2. A pure substance cannot be heteroge-
neous.

3. Heterogeneous solutions cannot be pure
substances.

4. Mixtures can be homogeneous.

Devillez (ld2653) – Test 1 Review – Devillez – (99998) 4

013 10.0 points 015 10.0 points
Which diagram(s) Which of these substances

I II I) carbon dioxide gas
II) distilled water
III III) jello
best characterize(s) a pure substance that is is a pure substance?
an element?
1. I and II only
1. I and III only
2. I and II only 2. I only
3. II and III only
4. None of these 3. II only
5. II only
6. All of these 4. II and III only
7. III only
8. I only 5. All of these

014 10.0 points 6. III only
Which of the following is a pure substance?
7. None of these
1. a puddle of milk
2. a rod of steel 8. I and III only
3. a block of wood
4. a cube of sugar 016 10.0 points
5. a strap of leather What is the proper solution to the following
equation?

(150 + 2.5 + 36.75) ÷ (6.60 + 0.173) =

1. 30

2. 27.942

3. 27.94183

4. 28

5. 27.9

6. 27.94

7. 27.9418

017 10.0 points
Which of the following numbers has the great-
est number of significant figures?

1. 130

Devillez (ld2653) – Test 1 Review – Devillez – (99998) 5

2. 0.690 Keeping in mind the rules for significant dig-
its, calculate the sum of 2.636 g and 0.7948
3. 1.2 g.

4. 33,000 1. 3.4 g

5. 0.0032 2. 3.43080 g

6. 4.3 × 102 3. 3.4308 g

018 10.0 points 4. 3.431 g
What is the length of the line segment in-
dicated on the scale provided using proper 5. 3.43 g
significant figures?
6. 3 g

0123 021 10.0 points
Keeping in mind the rules for significant fig-
1. 3.00 units ures, divide 92.80 g by 3.91111 mL.

2. 3.000 units 1. 23.73 g/mL

3. 3.0 units 2. 23.7 g/mL

4. 3 units 3. 23.727 g/mL

019 10.0 points 4. 23.7273 g/mL
What is the proper measurement of the vol-
ume represented? 5. 24 g/mL

5 022 10.0 points
mL For the conversion of 0.0003140 kilograms to
ounces, the conversion factors are 103 grams
4 per kilogram, 1 pound per 453.6 grams and
3 16 ounces per pound.
2
1 The correctly expressed answer is
1. 1.108 × 10−5 oz

2. 4.329 × 10−5 oz

1. 2.5 mL 3. 1.108 × 10−2 oz

2. 2.0 mL 4. 1.108 × 102 oz

3. 2.50 mL 5. 8.902 × 10−1 oz

4. 2.500 mL 023 10.0 points
020 10.0 points How many milliliters are in a 67.8 ft3 box?

Devillez (ld2653) – Test 1 Review – Devillez – (99998) 6

1. 1.92×106 mL 1. 13400 miles/hour

2. 13300 mL 2. 0.000482 miles/hour

3. 0.00239 mL 3. 20700 miles/hour

4. 2070 mL 4. 2070 miles/hour

5. 7150 mL 5. 0.000160 miles/hour

024 10.0 points 6. 0.576 miles/hour
An Olympic hurdler accelerates at a rate of 7. 3340000 miles/hour
15.5 m/s2. What is the rate in miles/min2?

1. 31.8 miles/min2 027 10.0 points
Calculate the density of methanol (CH3OH) if
2. 6.89 miles/min2 you know that there are 4.2 moles of methanol
in 5.67 L.
3. 0.581 miles/min2
1. 0.741 g/mL
4. 2.69 miles/min2
2. 0.0237 g/mL
5. 34.7 miles/min2
3. 1334 g/mL
6. 1.15 miles/min2
4. 0.0431 g/mL
7. 1.49 miles/min2
5. 0.131 g/mL
025 10.0 points
Given: 6. 11.34 g/mL

1 pound (lb) = 453.6 grams 028 10.0 points
1 pound = 16 ounces (oz) Polycarbonate plastic has a density of 1.3
How many ounces are equal to 0.0003140 g/cm3. A photo frame is constructed from
kilograms? Taking significant figures into ac- two 6.2 mm sheets of polycarbonate. Each
count, the correctly expressed answer is sheet measures 28 cm by 24 cm.
1. 1.1076 × 10−2 oz
What is the mass of the photo frame?
2. 1 × 10−2 oz
1. 730 g
3. 1.108 × 10−2 oz
2. 1100 g
4. 1.1 × 10−2 oz
3. 1000 g
5. 1.11 × 10−2 oz
4. 850 g
026 10.0 points
An oxygen molecule at 25◦C has a speed of 5. 1200 g
about 927 meters per second. Express this
speed in miles/hour. (1 mi = 5280 ft) 029 10.0 points

Devillez (ld2653) – Test 1 Review – Devillez – (99998) 7

The density of gold is 19.3 g/mL. What is the 3. 619 ◦F
mass of a gold nugget which has a volume of
3.28 mL? 4. 1324 ◦F

1. 5.88 g 5. 797 ◦F

2. 0.170 g 033 10.0 points
Identify the incorrect statement regarding
3. 63.3 g Dalton’s Atomic Theory.

4. 30.4 g 1. A given compound always has the same
relative numbers and types of atoms.
030 10.0 points
A solid has a mass of 95 grams. A graduated 2. All atoms of a given element are identi-
cylinder contains 35 mL of water. When the cal.
solid is completely submerged in the water,
the new water level reads 84 mL. 3. All matter is composed of atoms.

What is the density of the solid? 4. All matter is composed of protons, elec-
1. 2.7 g/mL trons, and neutrons.

2. 0.80 g/mL

3. 1.9 g/mL 034 10.0 points
4. -1.9 g/mL The following are all proposals of Dalton’s
5. 1.1 g/mL atomic theory. Which part of Dalton’s atomic
6. 190 g/mL theory was shown to be wrong by the discov-
ery of natural radioactivity?

1. Atoms combine in simple numerical ratios
to form compounds.

7. 0.52 g/mL 2. Atoms are permanent, unchanging, indi-
visible bodies.
031 10.0 points
On the Kelvin scale, a temperature of 43◦C is 3. Two or more kinds of atoms may combine
in different ways to form more than one kind
1. 43 K. of chemical compound.

2. 316 K. 4. Atoms of a given element all weigh the
same.
3. 273 K.

4. 230 K. 5. Compounds consist of collections of
molecules made up of atoms bonded to-
032 10.0 points gether.
Copper melts at 1083 ◦C. What is its melting
temperature in ◦F? 035 10.0 points
The discovery and characterization of cathode
1. 583 ◦F rays was important in the development of the
atomic theory because
2. 1981 ◦F

Devillez (ld2653) – Test 1 Review – Devillez – (99998) 8

1. it led to the suggestion of the existence of 5. Cathode rays were deflected towards a
the neutron. positively charged plate.

2. it indicated that all matter contained elec- 038 10.0 points
trons. Identify the experimental evidence that indi-
cates an atom has a positively charged nu-
3. it indicated that all matter contains pro- cleus.
tons.

4. None of the these is correct. 1. Electrons can be ejected from a metallic
surface with high energy light.
5. it indicated that all matter contains alpha
particles. 2. α particles are deflected at large angles
when projected toward a thin sheet of metal.
036 10.0 points
Rutherford’s α-scattering experiment showed 3. Cathode rays produce diffraction pat-
that most α particles directed toward a thin terns.
metallic foil passed through with only slight
deviations. From this evidence we can con- 4. Line spectra are produced from elemental
clude that gases in a gaseous discharge tube.

1. the mass of the atom is concentrated in a 5. Cathode rays are attracted to the positive
very small area. plate of an applied electrical field.

2. an α particle is a type of light which 039 10.0 points
should not be deflected. Which of the following is FALSE?

3. the foil was too thin. 1. The mass of a proton is much greater than
4. α particles are uncharged. the mass of an electron.
5. α particles are too small to hit anything.
2. The mass of protons and neutrons are
about the same.

037 10.0 points 3. The mass of neutrons and electrons are
What experimental evidence led Thomson to about the same.
conclude that cathode rays were negatively
charged? 4. The mass of a hydrogen atom is about the
same as a proton.
1. Cathode rays were deflected towards a
negatively charged plate. 040 10.0 points
How many electrons are present in one neon
2. Cathode rays pushed a paddle wheel atom?
counterclockwise.
1. 10

3. Cathode rays pushed a paddle wheel 2. 9
clockwise. 3. 11
4. 8
4. False; cathode rays are positively charged,
not negatively charged.

Devillez (ld2653) – Test 1 Review – Devillez – (99998) 9

5. 12 3. 25 protons, 25 neutrons and 25 elec-
trons.

041 10.0 points 4. None of these
How many protons are present in one iron(III)
ion? 5. 25 protons, 13 neutrons and 25 elec-
trons.
1. 25

2. 28 045 10.0 points
3. 26 Identify the isotope that has atoms with 12
neutrons, 10 protons, and 10 electrons.

4. 27 1. 22Na

5. 29 2. 10S

042 10.0 points 3. None of these
How many protons are present in one Ca2+ 4. 22Ne
ion? 5. 10P
6. 12Mg
1. 19 7. 12Al

2. 22 046 10.0 points
Write the hyphen notation for the element
3. 20 that contains 15 electrons and 15 neutrons.

4. 21 1. copper-60

5. 18 2. phosphorus-30

043 10.0 points
What is the symbol for the element which
contains 5 electrons in the neutral state?

1. C

2. B 3. silicon-30

3. Be 4. fluorine-15

4. Li 5. sulfur-31

044 10.0 points 6. phosphorus-31
A magnesium (Mg) atom with a mass num- 7. oxygen-15
ber of 25 contains 8. zinc-60

1. 13 protons, 12 neutrons and 12 elec-
trons.

2. 12 protons, 13 neutrons and 12 elec- 047 10.0 points
trons. Choose the correct nuclear symbol and hy-
phen notation for the isotope which has a

Devillez (ld2653) – Test 1 Review – Devillez – (99998) 10

mass number of 28 and atomic number of 14. Answer in units of g/mol.

1. 14 S, sulfur-14 050 10.0 points
28 Which of the following statements about a
nonmetal is true?
2. 14 P, phosphorus-14
14

3. 14 P, phosphorus-14 1. A nonmetal forms covalent bonds with
28 metals.

4. 14 Si, silicon-14 2. A nonmetal has metallic bonding.
14
3. A nonmetal tends to form cations.
5. 28 P, phosphorus-28
14 4. A nonmetal has more than 3 electrons in
its outer shell.
6. 28 Si, silicon-28
14 051 10.0 points
Which characteristic describes a metal?
7. 14 Si, silicon-14
28

8. 14 S, sulfur-14
14

9. 28 S, sulfur-28 1. brittle
14
2. malleable
048 10.0 points
A newly discovered element has two isotopes. 3. good insulator
One has an atomic weight of 120.9038 amu
with 57.25% abundance. The other has an 4. low conductivity
atomic weight of 122.8831 amu. What is the
atomic weight of the element? 5. tend to be reduced

1. 122.38 amu 052 10.0 points

2. 123.45 amu Identify the transition metals.
A. hafnium
3. 121.17 amu B. radium
C. radon
4. 122.15 amu

5. 121.54 amu 1. B and C only

6. 121.75 amu 2. A only

049 10.0 points 3. A, B, and C
Calculate the molar mass of the noble gas 4. A and B only
krypton in a natural sample, which is 0.81% 5. C only
78Kr (molar mass 77.92 g/mol), 1.82% 80Kr 6. B only
(molar mass 79.91 g/mol), 10.92% 82Kr (mo- 7. None of these
lar mass 81.91 g/mol), 12.42% 83Kr (molar
mass 82.92 g/mol), 56.65% 84Kr (molar mass
83.91 g/mol), and 17.38% 86Kr (molar mass
85.91 g/mol).

Devillez (ld2653) – Test 1 Review – Devillez – (99998) 11

8. A and C only Identify the nonmetal.
1. Z
053 10.0 points 2. X
Classify the elements Si, Sr, Sn, Sb.

1. metal; nonmetal; metal; nonmetal 3. Y

2. metalloid; metal; metal; nonmetal 056 10.0 points
3. nonmetal; nonmetal; metal; metalloid In the periodic table, which elements typically
have similar properties?

4. None of these 1. those in the same columns

5. metalloid; metal; metal; metalloid 2. those related diagonally

054 10.0 points 3. those on opposite sides
List the elements that are members of the 4. those in the same rows
alkali metals.

1. C, Si, Ge, Sn, Pb 057 10.0 points
2. Li, Na, K, Rb, Cs, Fr The letters in the periodic table are used to
identify four different elements.

3. B, Al, Ga, In, Tl D
4. None of these C
5. Be, Mg, Ca, Sr, Ba, Ra
B
A

6. N, P, As, Sb, Bi Based on the organization within the peri-
7. F, Cl, Br, I, At odic table, which element is expected to have
8. He, Ne, Ar, Kr, Xe, Rn 2+ charge when it forms an ion?
9. O, S, Se, Te, Po
1. C
055 10.0 points
Consider the periodic table 2. D

XY 3. B

4. A

Z 058 10.0 points
Of the following elements, the one which is

NOT a metal is

1. potassium.

2. iron.

Devillez (ld2653) – Test 1 Review – Devillez – (99998) 12

3. cobalt. In the periodic table, a vertical column of
elements is called
4. arsenic.
1. a lanthanide.
5. silver.
2. a group.
059 10.0 points
Of the following elements, the one which is 3. a period.
NOT a nonmetal is
4. an orbital.
1. phosphorous.
5. a transition.
2. bismuth.
063 10.0 points
Arsenic (As) is classified as

3. sulfur. 1. a transition element.

4. silicon. 2. an actinide.

5. iodine. 3. a lanthanide.

060 10.0 points 4. a noble gas.
Which of the following elements would be
expected to resemble strontium (Sr) most 5. a representative element.
closely in chemical properties?
064 10.0 points
1. Si What is the formula for the ionic compound
formed from sodium and oxide ions?
2. Ba

3. Li 1. NaO2

4. Cs 2. None of these

5. Sc 3. Na3O2

061 10.0 points 4. NaO
In the periodic table, a horizontal row of ele-
ments is called 5. Na2O

1. a group. 6. Na2O3

2. a period. 065 10.0 points
What is the formula for the ionic compound
3. a transition. formed from lithium and sulfide ions?

4. a lanthanide. 1. LiS

5. an orbital. 2. None of these

062 10.0 points

Devillez (ld2653) – Test 1 Review – Devillez – (99998) 13

3. Li4S 5. CaNO3
4. Li2S
5. Li2SO4 069 10.0 points
6. Li2S3 Which of the following ionic compounds has
the wrong chemical formula?
066 10.0 points
Write the formula of calcium nitride. 1. NaO2

2. KBr

1. Ca2N 3. K2S

2. Ca3N2 4. CaO

3. Ca2N3 5. MgCl2

4. None of these 070 10.0 points
Which of the following species has the greatest
5. CaN2 number of electrons?

6. CaN3 1. Cl−

7. Ca3N 2. F−

067 10.0 points 3. O2−
What is the formula of the compound made
by combining calcium (Ca) with sulfur (S)? 4. S2−

1. SCa2 5. I−

2. CaS 071 10.0 points
Which of the following species has the greatest
3. SCa number of electrons?

1. Al

4. CaS2 2. Na+

068 10.0 points 3. F−
What is the formula for the salt which con-
tains both Ca and NO3 ions? (Note that the 4. Fe2+
charges of the ions are not indicated.)
5. Ne
1. Ca(NO3)2
072 10.0 points
2. Ca3(NO3)2 An element (call it X) in Group IA of the peri-
odic table forms a compound with an element
3. Ca2(NO3)2 (call it Y) of Group VIA. What would be the
most likely formula and nature of the com-
4. Ca2NO3 pound?

Devillez (ld2653) – Test 1 Review – Devillez – (99998) 14

1. X2Y; covalent 2. None of these.
2. XY2; ionic
3. XY6; ionic 3. monophosphorus trichloride.
4. X6Y; ionic
5. X2Y; ionic 4. triphosphorus chloride.
6. XY2; covalent
7. XY6; covalent 5. phosphorus trichloride.

073 10.0 points 076 10.0 points
Choose that pair of names and formulas that What is the name of the compound with the
do not match. formula CCl4?

1. Fe2(SO4)3 : iron(III) sulfate 1. carbon tetrachloride
2. SnCl4 : tin(IV) chloride
3. MnCO3 : manganese(II) carbonate 2. carbon chloride

3. chlorine carbonide

4. carbon(IV) chloride

077 10.0 points
Write the formula of perchloric acid.

4. Cu2O : copper(II) oxide 1. HClO2
5. SnO : tin(II) oxide 2. HClO

074 10.0 points 3. HClO5
Which of the following pairs of names and 4. HClO4
formulas are correct? 5. HClO3
Z1) dinitrogen tetroxide : N2O4
Z2) calcium hydroxide : CaOH 078 10.0 points
Z3) tin : Sn What is the chemical formula for hypopophos-
phorous acid?
1. Z1) and Z3)
1. H2PO
2. Z1) only
2. H2PO4
3. Z1) and Z2) 3. H2PO5

4. Z1), Z2), and Z3) 4. HPO5
5. HPO8
5. Z3) only

075 10.0 points
The binary compound PCl3 is called

1. phosphorus chloride. 6. HPO

Devillez (ld2653) – Test 1 Review – Devillez – (99998) 15

7. H2PO2 Answer in units of mol.

8. H2PO3 083 (part 2 of 2) 10.0 points
How many moles of H2O are in 1.8 g of
9. H2PO6 AuCl3 · 2 H2O? Answer in units of mol.

10. H3PO2 084 10.0 points
How many fluorine atoms are in 4.0 moles of
079 10.0 points fluorine molecules?
Pick the name and formula that do NOT
match. 1. 1.5 × 1023 atoms

1. H2SO4 : sulfurous acid 2. 6.6 × 10−24 atoms

2. HIO (or HOI) : hypoiodous acid 3. 2.4 × 1024 atoms

3. HNO3 : nitric acid 4. 4.8 × 1024 atoms

4. HMnO4 : permanganic acid 085 10.0 points
Each mole of Al(NO3)3 contains how many
080 10.0 points moles of oxygen atoms?
Pick the name and formula that do NOT
match. 1. 12 mol

1. HCl : hydrochloric acid 2. 6 mol

2. H2CO3 : carbonic acid 3. 1 mol

3. H2SO4 : sulfuric acid 4. 3 mol

4. HClO4 : chloric acid 5. 9 mol

081 10.0 points 086 10.0 points
Which one has the greatest number of atoms? How many atoms of hydrogen are contained
in 1 mole of methane (CH4)?

1. 3.05 moles of CH4 1. 6.02 × 1023 atoms

2. 3.05 moles of water 2. The correct answer is not given.

3. 3.05 moles of helium 3. 2.41 × 1024 atoms

4. All have the same number of atoms 4. 4 atoms

5. 3.05 moles of argon 5. 3.01 × 1024 atoms

082 (part 1 of 2) 10.0 points 087 10.0 points
How many moles of Ag+ are in 3 g of AgCl? How many moles of carbon are in 8.00 moles
of C12H22O11?

Devillez (ld2653) – Test 1 Review – Devillez – (99998) 16

1. 8.00 mol mass. What mass of chlorine is contained in
61.7 g of ZnCl2?
2. 88.0 mol
Answer in units of g.
3. 96.0 mol
094 (part 2 of 2) 10.0 points
4. 10.0 mol How many moles of Cl is this? Answer in
units of mol.
088 10.0 points
How many sulfur atoms are in 78.4 g of sulfur? 095 10.0 points
Answer in units of atoms. What is the percentage of hydrogen in
C7H8O? The molecular weight of C is
089 10.0 points 12.011 g/mol, of H 1.00794 g/mol, and of
How many moles are in 418.8 g of Ba(OH)2? O 15.9994 g/mol. Answer in units of %.
Answer in units of mol.
096 10.0 points
090 10.0 points What mass of rhodium contains as many
How many moles are in 158.55 g of atoms as there are iron atoms in 28 g of iron?
Fe3(PO4)2? Answer in units of mol.
Answer in units of g.
091 10.0 points
Aspirin has a formula C9H8O4. What is the 097 (part 1 of 3) 10.0 points
molar mass of aspirin? a) How many CaH2 formula units are present
in 6.341 g of CaH2? Answer in units of
1. 95 g formula units.

2. 220 g 098 (part 2 of 3) 10.0 points
b) Find the mass of 6.22 × 1024 formula units
3. 325 g of NaBF4 (sodium tetrafluroborate). Answer
in units of g.
4. 180 g
099 (part 3 of 3) 10.0 points
092 10.0 points c) How many moles of CeI3 are in 9.66 ×
Although coal is not a pure chemical com- 1021 formula units of CeI3 (cerium(III) iodide;
pound, its elemental composition may be a bright, water, soluble solid). Answer in
approximated by the formula C135H96NO9S. units of mol.
What is the approximate percentage by mass
of sulfur in coal? 100 (part 1 of 3) 10.0 points
Find the mass of 2.72 mol Cl2. Answer in
units of g.

1. 1.68% 101 (part 2 of 3) 10.0 points
2. 0.413% Find the mass of 2.65 × 1023 molecules H2S.
Answer in units of g.

3. 42.8% 102 (part 3 of 3) 10.0 points
4. 3.11% Find the mass of 17 molecules SO2. Answer
in units of g.

093 (part 1 of 2) 10.0 points 103 10.0 points
Zinc chloride (ZnCl2) is 52.02% chlorine by

Devillez (ld2653) – Test 1 Review – Devillez – (99998) 17

How many molecules are in 1.20 g of SO2? 21.18% O, and 62.93% Os. What is the em-
Answer in units of molec. pirical formula of this compound?

104 10.0 points 1. OsCO
A can of mineral water contains 345 mL of
water. How many molecules of water does the 2. Os2C4O5
can contain? (water = 1.00 g/mL)
3. OsC3O5
1. 57.6 molec
4. OsCO4
2. 3.74 × 1027 molec
5. OsC4O4
3. 3.46 × 1025 molec
6. Os2CO4
4. 1.15 × 1025 molec
109 (part 2 of 2) 10.0 points
5. 19.2 molec From the mass spectrum of the compound,
the molecule was determined to have a molar
105 10.0 points mass of 907 g/mol. What is its molecular
formula?
How many aluminum atoms are in
198.273 g of Al2O3? Answer in units of atoms. 1. Os3C12O12

106 10.0 points 2. Os3C3O12
A 46 gram sample of NH3 contains how many 3. Os3C9O15
grams of H? Answer in units of g.

107 10.0 points 4. Os4C8O11
Iron forms a compound called ferrocene. It
has the composition 64.56% C, 5.42% H, and 5. Os4C2O8
30.02% Fe. What is the empirical formula of
ferrocene? 6. Os4C8O10

1. FeC6H5 110 10.0 points
Paclitaxel, which is extracted from the Pacific
2. Fe2C10H11 yew tree Taxus brevifolia, has antitumor ac-
tivity for ovarian and breast cancer. It is sold
3. FeC10H10 under the trade name Taxol. On analysis,
its mass percentage composition is 66.11% C,
4. FeC11H9 6.02% H, and 1.64% N, with the balance be-
ing oxygen. What is the empirical formula of
5. Fe3C11H12 paclitaxel?

6. FeC7H8 1. C47H51NO14

108 (part 1 of 2) 10.0 points 2. C45H50NO13
Osmium forms a number of molecular com-
pounds with carbon monoxide. One light- 3. C3H5NO4
yellow compound was analyzed to give the
following elemental composition: 15.89% C,

Devillez (ld2653) – Test 1 Review – Devillez – (99998) 18

4. C4H5NO9 atom. The measured atomic mass of 1362S is
31.972 070 amu.
5. C35H41NO8
1. 2.62 × 10−11 J
6. C49H53NO16 2. 4.36 × 10−11 J

111 10.0 points 3. None of these
What is the molecular formula of the molecule 4. 4.36 × 1011 J
that has an empirical formula of CH2O and a
molar mass of 120.12 g/mol?

1. CH2O 5. 2.73 × 10−12 J
2. C3H6O3 6. 1.36 × 10−12 J
3. C4H8O4 7. 2.62 × 1013 J

4. C5H10O5 114 10.0 points
5. C2H4O2 The mass of a 37Li atom is 7.016 00 amu.

Calculate its mass defect.

6. C6H12O6 1. None of these

112 10.0 points 2. 7 amu
An analysis of nicotine (MW = 162 g/mol) 3. 0.294 91 amu
gives 74.0% carbon, 8.65% hydrogen, and 4. 0.042 13 amu
17.3% nitrogen. What is the TRUE
(MOLECULAR) formula for nicotine?

1. C12H4N 5. 3 amu

2. C4H5N2 6. 1 amu

3. C10H14N2 7. 0.126 39amu

4. C9H12N3 115 10.0 points
5. C6H8N5 What is the mass defect of 1284Si which has an

actual mass of 27.97693 g/mol?

6. C5H7N 1. 0.0102 g

7. C8H10N4 2. 0.52416 g

8. C4H5N4 3. 0.1004 g

9. C11H16N 4. 0.25406 g

113 10.0 points 116 10.0 points
Calculate the nuclear binding energy of a 1326S When 131I emits a β particle, what nuclide is

Devillez (ld2653) – Test 1 Review – Devillez – (99998) 19
2. 28P
produced?
1. 131Xe 3. 28S
2. 131Te
3. 130I 4. 24Mg
4. 130Te
5. 127Sb 120 10.0 points
What is the least massive particle?

1. proton

2. α particle

117 10.0 points 3. electron
A nuclide undergoes proton emission to form
52Fe. What is the nuclide? 4. neutron

1. 56Ni 121 10.0 points
Uranium-238 decays by emission of an alpha
2. 52Mn particle. The product of this decay is
3. 53Co
1. 28384Ra .
4. 52Co
5. 53Fe 2. 29314Pa .

118 10.0 points 3. 29304Th .
What type of particle is emitted in the trans-
formation 4. 29324U .

201Pt → 201Au ? 122 10.0 points
Balance the nuclear equation
1. positron
3125P + ? −→ 33 P
15

2. β particle 1. None of these
2. ? = −10β
3. γ particle 3. ? = 1345P
4. ? = 42He
4. No particle is emitted because electron 5. ? = 01n
capture occurs. 6. ? = 115P
7. ? = 11p
5. α particle

119 10.0 points
What nuclide is formed when 24Na undergoes
β decay?

1. 24Ne

Devillez (ld2653) – Test 1 Review – Devillez – (99998) 20

123 10.0 points 2. 56 days
3. 14 days
For the nuclear reaction 4. 28 days
239 29325U
94 Pu → + ?,

the missing particle is

1. 1n. 5. 70 days

2. e−. 127 10.0 points
3. 24He. The isotope 90Sr has a half-life of 28 years. If
4. 1p. you have 16 g of 90Sr today, how much will be
left in 112 years?

1. 1 g

124 10.0 points 2. 8 g
The half-life of carbon-14 is 5,730 years. If
you started with 100.0 g of carbon-14, how 3. 2 g
much would remain after 4 half-lives?
4. 4 g
1. 12.5 g
128 10.0 points
2. 57.3 g Calculate the energy change when one 235U
nucleus undergoes the fission reaction
3. 25.0 g
235U + n → 142Ba + 92Kr + 2 n .
4. 6.25 g The masses needed are 235U : 235.04 u;
142Ba : 141.92 u; 92Kr : 91.92 u; n : 1.0087 u.
125 10.0 points 1. −2.8 × 10−11 J
If you have 200.0 g of radioisotope with a half- 2. −1.7 × 10−10 J
life of 5 days, how much isotope would remain 3. +1.8 × 10−10 J
after 15 days? 4. +2.9 × 10−11 J
5. −3.2 × 10−28 J
1. 40.0 g
129 10.0 points
2. 13.3 g What nuclear reaction probably does not oc-
cur in a conventional fission nuclear reactor
3. 12.5 g designed to produce energy?

4. 25.0 g 1. 235U + n →239Pu
2. 235U + n →103Mo + 131Sn + 2 n
126 10.0 points
The half-life of P-32 is 14 days. How long after
a sample is delivered can a laboratory wait to
use a sample in an experiment if they need at
least 10 percent of the original radioactivity?

1. 42 days

Devillez (ld2653) – Test 1 Review – Devillez – (99998) 21

3. 235U + n →90Sr + 143Xe + 3 n 1. 2 C2H6 + 3 O2 → 4 C + 6 H2O + energy

4. 235U + n →141Ba + 92Kr + 3 n 2. 10n + 29325U → 9308Sr + 143 Xe + energy
54

130 10.0 points 3. 21H + 13H → 4 He + 10n + energy
2
In the fission process
29329U 15463Ba 86
→ + 36 Kr + X n, 4. 24He + 29325 U 238 Pu + energy
94
what is X? →

1. 5

2. 20

3. 15

4. 10

5. 25

131 10.0 points
In nuclear fission, which is true?

1. One large atom splits into two or more
smaller atoms.

2. Two or more smaller atoms combine to
form one larger atom.

3. Individual protons split into smaller
pieces.

4. Electrons combine to form larger, nega-
tively charged particles.

132 10.0 points

The nuclear equation
21H + 31H → 24He + 01n

is an example of

1. a branching chain.

2. nuclear fission.

3. nuclear fusion.

4. a chain reaction.

133 10.0 points
Which reaction best describes nuclear fusion?