CHM 103 Exams
The correct formula for ammonium carbonate is... (NH4)2CO2 (NH4)4C (NH4)2CO3 NH4CO3 NH4(CO3)2
(NH4)2CO3
Which has the greatest volume? 0.00001 ML (Mega-liter) 100 cL 1000 mL 0.1 kL 10,000 uL 10 L
0.1 kL
Which measurement below has the fewest significant figures? 1.20 x 10^4 g 7.200 x 10^5 g 1.060 x 10^-2 g 410.0 g 4700. m
1.20 x 10^4 g
The diameter of the planet Earth is 7917.5 miles. What is the diameter in meters? Hint - there are 0.621 miles in 1 kilometer. 6.78x10^6 m 1.21x10^7 m 1.27x10^7 m 3.48x10^6 m 2.38x10^6 m 6.43x10^6 m
1.27x10^7 m
How many atoms are contained in 80.15 g of sulfur? 1.506x10^24 atoms 1.362x10^24 atoms 1.558x10^24 atoms 9.475x10^23 atoms 1.985x10^24 atoms
1.506x10^24 atoms
How many atoms are contained in 5.094 g of vanadium? 1/10 of Avogadro's number 1/10 of an atom 1 Avogadro's number. 1 atom
1/10 of Avogadro's number
One mole of boron atoms would have the mass of .... 10.81 atomic mass units 9.012 grams 6.022x10^23 atomic mass units. 10.81 grams
10.81 grams
A piece of metal was found on the side of the road. The metal was put on a balance and found to have a mass of 80.00 g. The volume was determined by placing the metal into a 25.00 ml column of oil, which was displaced to 32.00 mL. What was the Density of this metal? Answer:
11.43
Complete the Avogadro's Statement for the element tin: 1 mole of tin = 6.02 x 1023 tin atoms = ____ grams. 47.88 127.6 207.2 204.4 118.7
118.7
What is the formula weight of leucine, C6H13NO2 ? ___________ 149.21.19 g/mole 75.07 g/mole 105.04 g/mole 131.17 g/mole 121.16 g/mole 204.23 g/mole
131.17 g/mole
One mole of nitrogen atoms would have the mass of ... 14.01 grams 14.01 u 6.022x10^23 atomic mass units 7 atomic mass units
14.01 grams
If Paris, France is 10'538.2 miles from Sydney, Australia. How many kilometers would that be? Note: 1 km = 0.621 miles. 6544.2 km 16,970 km 959.7 km 16,969.7 km 6544 km
16,969.7 km
What is the actually electron configuration of Cr? 1s2 2s2 2p6 3s2 3p6 4s2 3d4 1s2 2s2 2p6 3s2 3p6 4s1 3d5 1s2 2s2 2p6 3s2 3p6 4s2 4d4 1s2 2s2 2p6 3s2 3p6 4d6 [Ar] 4s2 3d4 [Ne] 4s1 4d5
1s2 2s2 2p6 3s2 3p6 4s1 3d5
How many electrons are associated with a lone pair of non-bond electrons? 4 2 5 8 6 3
2
Which of the following correctly illustrates hydrogen bonding between neighboring water molecules?
2 H2O connected by H and O
What is the mass percentage of C in CO2 27.3% 74.9% 82.2% 40.1% 88.8%
27.3%
What is the closest formula mass of the compound formed between Ca 2+ and I 1-? 184.33 u 293.89 95.21 u 86.32 u 110.63 u 38.31 u
293.89
What is the correct filling order for electron configuration? 2p, 3s, 3p, 4s, 3d, 4p 4d, 5s, 5d, 6s 2p, 2d, 3s, 3p, 4s, 3d, 4p 5s, 4d, 5p 2p, 3s, 3p, 4s, 3d, 4p 5s, 4d, 5p, 6s 2p, 3s, 3p, 3d, 4s, 4p, 4d, 5s, 5p, 6s
2p, 3s, 3p, 4s, 3d, 4p 5s, 4d, 5p, 6s
How many atoms of chlorine are present in 0.345 g of CuCl2? Recall the Avogadro's statement: 1 mole of CuCl2 weighs 134.45 g and contains 6.022x10^23 CuCl2 formula units. (pick closest answer) -1.20x10^24 Cl atoms. -1.55x10^21 Cl atoms. -6.022x10^23 Cl atoms. -3.09x10^21 Cl atoms.
3.09x10^21 Cl atoms. (1.55x10^21 Cl atoms gave 50% correct)
At its closest approach to Earth, the Planet Mars is 33.9 million miles away. What is the correct way to express that in scientific notation? 33.9x10^8 miles 33.9x10^7 miles 3.39x10^6 miles 3.39x10^7 miles 3.39x10^8 miles 33.9x10^6 miles
3.39x10^7 miles
An Avogadro's number of phosphorus atoms would have a mass of 39.10 amu 30.97 amu 6.02 x 1023 grams 30.97 grams 39.10 grams 15 grams 19 grams
30.97 grams
Please convert 195.0 oF to Kelvin temperature. Answer:
363.7
When sodium loses electrons to form a sodium cation, electrons are lost from which subshell(s)? 2s 3s and 3p 3d 2s and 2p 3s and 3d 3p 2p 3s
3s
The mass value 3999.69 grams, correctly rounded to three significant figures, should be written as: 3.99 x 10^3 grams 399 grams 4.00 x 10^3 grams 400 grams 4.00 x 10^2 grams
4.00 x 10^3 grams
My drive way is 34.0 ft wide and 35.0 ft long. I want to patch and re-tar my driveway. This will cost $55.00 per square meter. Recall that there are 3.381 ft in 1 meter. How much will this cost me? _________ Express your answer to the whole cent. Answer:
5,725.58
Using the ruler below the fish, which is the correct measurement of the length of the fish? 54 cm 50.35 cm 50.4 cm 50.3 cm 53.5 cm 53 cm
53.5 cm
Which isotope has the same number of neutrons as 64Ni? 58Fe None do. 59Co 66Zn 64Cu
66Zn
What volume would 1.00 mol of pure copper metal occupy? (note: density of copper is 8.96 g/ml) 8.96 mL 14.7 mL 11.2 mL 7.09 mL
7.09 mL
One atom of calcium-44 and one atom of tin-116 will have how many total number of protons. 92 protons 60 protons 98 protons 58 protons 70 protons
70 protons
In the radioactive decay cycle of uranium, how many protons and how many neutrons are lost when uranium-233 decays to bismuth-209? 9 protons and 24 neutrons 26 protons and 16 neurons 9 protons and 15 neutrons 8 protons and 26 neutrons 8 protons and 18 neutrons 24 protons and 10 neutrons
9 protons and 15 neutrons
Which of the following is always a characteristic of a chemical change? A change of physical state occurs. Heat is released. Heat is absorbed. Light is emitted. A new substance is produced.
A new substance is produced.
Which of the following statements about the three temperature scales, (Fahrenheit, Celsius and Kelvin) is NOT correct? A Celsius degree and a Kelvin unit contain the same amount of heat energy. A Fahrenheit degree contains less heat energy than a Celsius degree. The boiling point fo water is a larger number in *F than in *C. No temperature value can be below zero on the Kelvin scale. Absolute zero on the Celsius scale is -473.15 *C.
Absolute zero on the Celsius scale is -473.15 *C
Which are the correct symbols for Silver, Copper, Selenium and Titanium ? Al, Co, K and Kr Au, Cu, Hg and I Ag, Cr, Mn and Fe Au, C, Pb and Ni Al, Cr, Mg and I Ag, Cu, Se and Ti
Ag, Cu, Se and Ti
What isotope has 13 protons, and 14 neutrons? Co-27 Al-27 Al-13 Si-14 Si-29
Al-27
Which pair of Atoms contains a total of 30 protons? Potassium and Hydrogen Scandium and Boron Aluminum and Chlorine Selenium and Argon Calcium and Silicon Magnesium and Titanium
Aluminum and Chlorine
What is the name of the element whose chemical symbol is As? Aluminum Adamantium Gold Argon Arsenic Silver
Arsenic
Which one of the following molecules would be nonpolar covalent? Cu CH3F H2O KF CF4
CF4
Which molecule would have the strongest tendency to form hydrogen bonds with other identical molecules? C2H6 H2 CH3OH HCl CH4
CH3OH
Which of the following ions has the noble gas electronic configuration of argon? Na+ F- B3+ Se2- Ca2+
Ca2+
Which neutral atom of the following elements contains a total of 29 electrons? Se V Si Ni Na Cu
Cu
1 cm^2 is equal in volume to 1 ml. True False
False
6 moles of Nitrogen has more mass than 2 moles of Copper True False
False
A lithium atom has a larger radius than a potassium atom. True False
False
All numbers have some uncertainty associated with them. True False
False
Boron trifluoride has a tetrahedral electronic geometry. True False
False
Hydrogen bond forces between neighboring molecules are usually stronger than ionic interactions between neighboring particles. True False
False
Most of the volume of the atom is in the nucleus. True False
False
The chemical symbol for gold is Ag. True False
False
The f-subshell shell can contain 28 electrons. True False
False
The ions Co2+ and Co3+ are isoelectronic to each other. True False
False
The second shell contains three subshells True False
False
Which element would have the smallest atomic radius? lithium iodine fluorine bromine cesium potassium
Fluorine
Which element would require the most energy to remove its distinguishing electron? cesium iodine fluorine lithium
Fluorine
Bromine is a reddish-brown fuming liquid with a density of 3.10 g/L. It can freeze solid at -7.2 *C and it reacts very rapidly with potassium to form KBr. Which is one physical and one chemical property? Density is 3.10 g/L and it freezes at -7.2 *C Reddish-brown fuming liquid and it freezes at -7.2 *C Reddish-brown fuming liquid and the density is 3.10 g/L. Freezes at -7.2 *C and reacts very rapidly with potassium to form KBr.
Freezes at -7.2 *C and reacts very rapidly with potassium to form KBr.
Which isotope has 79 protons and 118 neutrons. Argon-38 Gold-197 Bromine-79 Bromine-35 Tin-50 None of these.
Gold-197
Which of the following would you expect to have bent molcular geometry? H2Se KCl SiH4 CO2
H2Se
What type of molecule is HBr?? HBr is a hetero-triatomic molecule. HBr is a monoatomic molecule. HBr is a hetero-diatomic molecule. HBrl is a homo-triatomic molecule. HBr is a homo-diatomic molecule.
HBr is a hetero-diatomic molecule.
Which would have a greater formula weight: magnesium chloride, MgCl2, made from the heavy magnesium isotope Mg-26 and the light chlorine isotope Cl-35 or made from the light magnesium isotope Mg-24 and the heavy chlorine isotope Cl-37? Both weigh the same = 95.21 g/mol. Heavy magnesium isotope Mg-26 and the light chlorine isotope Cl-35 = 96.00 g/mol. Heavy magnesium isotope Mg-26 and the light chlorine isotope Cl-35 = 98.00 g/mol. Light magnesium isotope Mg-24 and the heavy chlorine isotope Cl-37 = 61.00 g/mol. Light magnesium isotope Mg-24 and the heavy chlorine isotope Cl-37 = 98.00 g/mol.
Light magnesium isotope Mg-24 and the heavy chlorine isotope Cl-37 = 98.00 g/mol.
An isotope of a particular element has a mass number equal to twice the atomic number. The neutral atom contains 25 electrons. The isotope must be... Manganese-50 Magnesium -24 Oxygen-16 Sulfur-33 Argon-19 Carbon-12
Manganese-50
Which molecule would have the largest dipole? P4 N2 H2 CF4 NH3
NH3
What is the chemical formula of the compound formed from the elements sodium and bromine? NaBr NaBs SoB3 SBr3 NaBr1
NaBr
Which isotope has the same number of protons as neutrons? Carbon-14 Neon-20 Lead-207 Nickel-58
Neon-20
Which statement is NOT consistent with our model of atomic structure? Neutrons don't contribute significantly to the mass of the atom. The nucleus contains both charged and uncharged particles, The electrons are located outside of the nucleus the nucleus is positively charged. Electrons don't contribute significantly to the mass of the atom.
Neutrons don't contribute significantly to the mass of the atom.
The correct formula for the ionic compound containing the nickel(II) cation and the phosphate polyatomic anion would be... Ni2(PO4)2 Ni3(PO4)2 Ni2(PO4)3 NiPO4 Ni3(PO4)3
Ni3(PO4)2
Which of the following violates Pauli Exclusion Rule?
Option with 2 arrows facing down in first orbital
Which of the following ions contains the same total number of unpaired electrons as vanadium? F Cl Ca P O Na
P
In which ionic compound would the metal cation have the Roman numeral IV as part of its name? Al2S3 Na4C SnS PbO2
PbO2
Which of these is characteristic of a homogeneous solution? There is no variation of physical properties throughout the solution. The solution must be a clear liquid to be homogeneous. The composition of the solution is different depending on what part you measure. The solution has two or more physical phases present.
There is no variation of physical properties throughout the solution.
If an atom is electrically neutral, then this means... There must be equal numbers of neutrons and electrons. There must be equal numbers of electrons and protons. There must be more neutrons than electrons. There must be more protons than neutrons. There must be equal numbers of protons than neutrons.
There must be equal numbers of electrons and protons.
What would be true about 2.5 moles of glucose C6H12O6? There would be 12 moles of Carbon atoms There would be 30 moles of Hydrogen atoms There would be 6 x 6.022x10 ^23 Carbon atoms. There would be 18 moles of Oxygen atoms.
There would be 30 moles of Hydrogen atoms
If two neutron atoms are isotopes of the same element, then how are they different from each other? They have different numbers of electrons. They have different nuclear charges. They have different numbers of protons. They have different numbers of neutrons.
They have different numbers of neutrons.
A rock on Mars would have the same mass if taken back to Earth. True False
True
A sodium atom has a larger size than a sulfur atom. True False
True
Carbon tetrabromide is a tetrahedral molecule. True False
True
In the Color Scheme of chemistry, Hydrogen atoms are depicted as white and Oxygen atoms are depicted as red. True False
True
The name of the compound formed between is Mn3+ and O2- manganese(III) oxide. True False
True
The rusting of a Nail is both a chemical and a physical change. True False
True
Which of the following is an extensive physical property of matter? Weight Flammability Density Freezing point
Weight
Which best describes the weight of a sample of matter? Weight can not be measured without changing the chemical identity of the object. Weight is a constant measure of the amount of material in an object. Weight is the amount of space the object occupies. Weight is a measure of the gravitational force acting on the object.
Weight is a measure of the gravitational force acting on the object.
For zinc, write the symbol and distinguishing electron. As, 4p3 Ag, 4p10 Ar, 2p6 Zn, 3d10 Zr, 4d2 Zn, 3d4
Zn, 3d10
Which is the correct electron configuration of the neutral sodium, Na atom? (Pick all correct) [Ne] 3s1 [He] 2s2 2p3 1s2 2s2 2p6 1s2 2s2 2p6 3s1
[Ne] 3s1 & 1s2 2s2 2p6 3s1
A polar molecule must have -both polar bonds and an unsymmetric arrangement -an unsymmetric arrangement polar bonds -neither polar bonds nor an -unsymmetric arrangement
both polar bonds and an unsymmetric arrangement
What would be the proper name for the following binary ionic compound CaBr2? calcium bromide calcium(II) bromide calcium dibromine monocalcium dibromine calcium bromine
calcium bromide
Which statement is correct for d subshells? They... -contain spherical orbitals -fill before p subshells in the same shell -contain a set of five orbitals -can hold 5 electrons in each orbital -fill 2e- in the first orbital, then 2e- in the second orbital, etc
contain a set of five orbitals
What is the systematic chemical name for the pigment King's Yellow, the covalent compound As2S3 ? -arsenic tetrasulfide -diarsenic trisulfide -arsenic(II) sufide -arsenic sulfate -diarsenic tetrasulfide -arsenic(III) sulfide
diarsenic trisulfide
The correct names for the covalent compound N2O3 and the ionic compound FePO4 are: -nitrogen pentoxide and iron(III) phosphide -dinitrogen trioxide and iron(III) phosphate -dinitrogen tetroxide and iron(II) phosphide -nitrogen monoxide and iron(II) phosphate -nitrogen oxide and iron(III) phosphate -dinitrogen trioxide and iron(II) phosphide
dinitrogen trioxide and iron(III) phosphate
What is the name of the intermolecular force caused by an instantaneous dipole in each particle? ionic attraction dipole-dipole interaction covalent bond dispersion force hydrogen bond
dispersion force
What conditions are required to insure that a molecule will be nonpolar covalent? -electronegativity difference between atoms is less than 0.4. -a bond between atoms that are of widely different atomic weights. -electronegativity difference between atoms is > 0.4 and molecule is assymmetric. -electronegativity difference between atoms is 1.0 and molecule is symmetric.
electronegativity difference between atoms is less than 0.4.
How would sulfur achieve an octet when reacting with a metal element to form a compound... -gain one electron -lose two electrons -form 2 bonds and 2 lone pairs -gain two electrons -lose one electron -form 3 bonds and 1 lone pair
gain two electrons
Which statement is correct for d subshells? They... -have cloverleaf-shaped orbitals -can hold a total of 14 electrons -can hold 5 electrons in each orbital -fill before p subshells in the same shell -contain a set of seven orbitals
have cloverleaf-shaped orbitals
A calorie is a measure of: volume weight light mass time heat
heat
What is the correct Lewis dot structure for the molecule with the chemical formula C2H4NOI?
i and h attached to n, n attached to c, c attached to o and c, 3 h attached to c
A correct electron dot formula for ICl is
i with 6, Cl with 6, : in the middle of the two
The distinguishing electron for an inner transition metal is: in an f orbital in a d orbital in a p orbital in an s orbital
in an f orbital
Which cation would combine with the hydroxide diatomic anion in a 1:4 ratio? manganese(IV) cation nickel(III) cation iron(II) cation copper(I) cation
manganese(IV) cation
Which element exist as a diatomic molecule that has a triple bond and two lone pairs of electrons? neon oxygen chlorine nitrogen hydrogen
nitrogen
Which of these has the smallest mass? -one gram of carbon atoms -an Avogadro's number of helium atoms -one mole of neon atoms -one atom of platinum
one atom of platinum
The collection of two or more atoms, covalently bonded together but also possessing an ionic charge is called a.... crystal lattice polyatomic ion molecule binary compound
polyatomic ion
A divalent cation has: -two fewer electrons than neutrons. -same number of electrons and protons. -one more electron than protons. -one more electron than neutrons. -two fewer electrons than protons.
two fewer electrons than protons
Which one of these numbers is correctly expressed in scientific notation? −0.0224x10^−3 25.7^4 None of these 0.425x10^−1 34.5x10^4.2 −4.53x10^−2
−4.53x10^−2
