chem final part 2

Which of the following are examples of intensive properties? A) boiling point B) volume C) mass D) None of the above are examples of intensive properties. E) All of the above are examples of intensive properties.

A) boiling point

For a given atom, identify the species that has the smallest radius. A) cation B) anion C) neutral D) They are all the same size

A) cation

Place the following in order of increasing IE1. N F As A) N < As < F B) As < N < F C) F < N < As D) As < F < N E) F < As < N

B) As < N < F

How many of the following molecules have sp2 hybridization on the central atom? HCN SO2 OCl2 XeCl2 A) 4 B) 3 C) 2 D) 1 E) 0

D) 1

Calculate the mass (in mg) of 4.82 × 1022 atoms of sodium. A) 3.48 mg B) 287 × 103 mg C) 287 mg D) 1.84 × 103 mg E) 1.84 mg

D) 1.84 × 103 mg

How many iron atoms are contained in 354 g of iron? A) 2.62 × 1025 Fe atoms B) 2.13 × 1026 Fe atoms C) 4.69 × 1024 Fe atoms D) 3.82 × 1024 Fe atoms E) 9.50 × 1022 Fe atoms

D) 3.82 × 1024 Fe atoms

What answer should be reported, with the correct number of significant figures, for the following calculation? (965.43 × 3.911) + 9413.4136 A) 13189 B) 13189.2 C) 1.32 × 104 D) 1.3 × 104 E) 1.319 × 104

A) 13189

Which of the following is the SMALLEST volume? A) 2.6 cm3 B) 0.065 dL C) 3.5 × 102 mL D) 9.0 × 106 nL

A) 2.6 cm3

How many moles of Kr are contained in 398 mg of Kr? A) 4.75 × 10-3 moles Kr B) 33.4 moles Kr C) 2.11 × 10-4 moles Kr D) 2.99 × 10-3 moles Kr E) 1.19 × 10-4 moles Kr

A) 4.75 × 10-3 moles Kr

Which of the following statements about subatomic particles is TRUE? A) A neutral atom contains the same number of protons and electrons. B) Protons have about the same mass as electrons. C) Electrons make up most of the mass of an atom. D) Protons and neutrons have opposite, but equal in magnitude, charges. E) Neutrons and electrons are found in the nucleus of an atom.

A) A neutral atom contains the same number of protons and electrons.

Which of the following statements is TRUE? A) An orbital that penetrates into the region occupied by core electrons is less shielded from nuclear charge than an orbital that does not penetrate and therefore has a lower energy. B) An orbital that penetrates into the region occupied by core electrons is more shielded from nuclear charge than an orbital that does not penetrate and therefore has a lower energy. C) It is possible for two electrons in the same atom to have identical values for all four quantum numbers. D) Two electrons in the same orbital can have the same spin. E) None of the above are true.

A) An orbital that penetrates into the region occupied by core electrons is less shielded from nuclear charge than an orbital that does not penetrate and therefore has a lower energy.

A sample of a compound containing only carbon and oxygen decomposes and produces 24.50g of carbon and 32.59g of oxygen. What is the sample? A) CO B) CO2 C) CO3 D) C3O2 E) C2O

A) CO

All samples of a given compound, regardless of their source or how they were prepared, have the same proportions of their constituent elements. Which law does this refer to? A) Law of Definite Proportions B) Law of the Conservation of Mass C) Law of Modern Atomic Theory D) Law of Multiple Proportions E) First Law of Thermodynamics

A) Law of Definite Proportions

Identify the instrument that is used to determine the mass of a molecule. A) mass spectrometer B) nuclear magnetic resonance spectrometer C) infrared spectrometer D) gas chromatograph E) ultraviolet spectrophotometer

A) mass spectrometer

What answer should be reported, with the correct number of significant figures, for the following calculation? (249.362 + 41) / 63.498 A) 4.6 B) 4.57 C) 4.573 D) 4.5728 E) 4.57277

B) 4.57

Determine the mass of a metal cube that has a density of 12.7 g/mL and a volume of 87.63 mL. A) 4.83 × 103 g B) 1.11 × 103 g C) 8.32 × 10-2 g D) 1.45 g 10-1 g E) 3.90 × 102 g

B) 1.11 × 103 g

Place the following in order of increasing radius. Br⁻ Na⁺ Rb⁺ A) Br⁻ < Rb⁺ < Na⁺ B) Na⁺ < Rb⁺ < Br⁻ C) Rb⁺ < Br⁻ < Na⁺ D) Br⁻ < Na⁺ < Rb⁺ E) Rb⁺ < Na⁺ < Br

B) Na⁺ < Rb⁺ < Br⁻

Which of the following is an example of the law of multiple proportions? A) A sample of chlorine is found to contain three times as much Cl-35 as Cl-37. B) Two different compounds formed from carbon and oxygen have the following mass ratios: 1.33 g O: 1 g C and 2.66 g O: 1 g C. C) Two different samples of table salt are found to have the same ratio of sodium to chlorine. D) The atomic mass of bromine is found to be 79.90 amu. E) Nitrogen dioxide always has a mass ratio of 2.28 g O: 1 g N.

B) Two different compounds formed from carbon and oxygen have the following mass ratios: 1.33 g O: 1 g C and 2.66 g O: 1 g C.

Choose the ground state electron configuration for Zn2⁺. A) [Ar]4s23d8 B) [Ar]3d10 C) [Ar]4s23d6 D) [Ar] E) [Ar]3d8

B) [Ar]3d10

Determine the number of protons, neutrons and electrons in the following. 40X18 A) p+ = 18 n° = 18 e- = 22 B) p+ = 18 n° = 22 e- = 18 C) p+ = 22 n° = 18 e- = 18 D) p+ = 18 n° = 22 e- = 40 E) p+ = 40 n° = 22 e- = 18

B) p+ = 18 n° = 22 e- = 18

Give the hybridization for the Br in BrCl3. A) sp3d2 B) sp3d C) sp3 D) sp2 E) sp

B) sp3d

How many significant figures are there in the answer for the following problem?|(154.7-132)*3.07|/.700 = ? A) one B) two C) three D) four

B) two

How many xenon atoms are contained in 2.36 moles of xenon? A) 3.92 × 1024 xenon atoms B) 2.55 × 1023 xenon atoms C) 1.42 × 1024 xenon atoms D) 7.91 × 1025 xenon atoms E) 1.87 × 1026 xenon atoms

C) 1.42 × 1024 xenon atoms

Read the length of the metal bar with the correct number of significant figures. A) 20 cm B) 15 cm C) 15.0 cm D) 15.00 cm E) 15.000 cm

C) 15.0 cm

An element has three stable isotopes with masses of 27.977 amu, 28.976 amu, and 29.973 amu. The heavier two isotopes have an abundance of 4.68% and 3.09%, respectively. What is the mass of the element? A) 27.684 amu B) 29.251 amu C) 28.085 amu D) 30.107 amu E) 28.991 amu

C) 28.085 amu

Give the number of core electrons for Cd. A) 44 B) 48 C) 46 D) 45 E) 47

C) 46

If the walls in a room are 955 square feet in area, and a gallon of paint covers 15 square yards, how many gallons of paint are needed for the room? (3 ft = 1 yd) A) 47 gallons B) 21 gallons C) 7.1 gallons D) 24 gallons E) 2.3 gallons

C) 7.1 gallons

Read the water level with the correct number of significant figures. A) 87 ml B) 87.2 mL C) 87.20 mL D) 87.200 mL E) 87.2000 mL

C) 87.20 mL

The element that corresponds to the electron configuration 1s22s22p63s23p64s13d5 is A) titanium. B) vanadium. C) chromium. D) manganese. E) iron

C) chromium.

Choose the valence orbital diagram that represents the ground state of Sr2⁺. A) 5s2 B) 5s 5p2 C) 5s 4d2 D) 4s 4p6 E) 4p6

D) 4s 4p6

Convert 781K into Celsius A) 672°C B) 273°C C) 1054°C D) 508°C E) 835°C

D) 508°C

Draw the molecular orbital diagram shown to determine which of the following is paramagnetic. A) O22⁻ B) Ne22⁺ C) O22⁺ D) F22⁺ E) None of the above are paramagnetic.

D) F22⁺

Use the molecular orbital diagram shown to determine which of the following are paramagnetic. A) O22⁻ B) Ne22⁺ C) O22⁺ D) F22⁺ E) None of the above are paramagnetic

D) F22⁺

A student performs an experiment to determine the density of a sugar solution. She obtains the following results: 1.11 g/mL, 1.81 g/mL, 1.95 g/mL, 1.75 g/mL. If the actual value for the density of the sugar solution is 1.75 g/mL, which statement below best describes her results? A) Her results are precise, but not accurate. B) Her results are accurate, but not precise. C) Her results are both precise and accurate D) Her results are neither precise nor accurate. E) It isn't possible to determine with the information given.

D) Her results are neither precise nor accurate.

Draw the molecular orbital diagram shown to determine which of the following is MOST stable. A) F2 B) F22⁺ C) Ne22⁺ D) O22⁺ E) F22⁻

D) O22⁺

Use the molecular orbital diagram shown to determine which of the following is MOST stable. A) F2 B) F22⁺ C) Ne22⁺ D) O22⁺ E) F22⁻

D) O22⁺

Which of the following statements is FALSE? A) An anion is usually larger than its corresponding atom. B) Metals tend to form cations. C) An atoms is usually larger than its corresponding cation. D) The halogens tend to form 1+ ions. E) Nonmetals tend to gain electrons.

D) The halogens tend to form 1+ ions.

Give the ground state electron configuration for Se2⁻. A) [Ar]4s23d104p4 B) [Ar]4s23d104p2 C) [Ar]4s24p6 D) [Ar]4s23d104p6 E) [Ar]4s23d84p6

D) [Ar]4s23d104p6

What does "X" represent in the following symbol? 80 X 35 A) mercury B) chlorine C) scandium D) bromine E) selenium

D) bromine

The Scientific Method A) is just a theory. B) is a strict set of rules and procedures that lead to inarguable fact. C) isn't used much in modern chemistry. D) is based on continued observation and experiment. E) is a framework for proving an argument you know to be true.

D) is based on continued observation and experiment.

Rutherford's Gold Foil Experiment helped prove A) the diameter of a gold atom. B) the exact charge of an electrons. C) the exact mass of a gold atom. D) that the mass of an atom is concentrated in a very small space. E) the mass to charge ratio of an electron.

D) that the mass of an atom is concentrated in a very small space.

Draw the molecular orbital diagram and determine the bond order for NO+. A) 0.5 B) 1 C) 2 D) 2.5 E) 3

E) 3

Identify the number of electron groups around a molecule with sp3d2 hybridization. A) 2 B) 2 C) 3 D) 4 E) 6

E) 6

Which of the following statements is TRUE? A) A scientific law is fact. B) Once a theory is constructed, it is considered fact. C) A hypothesis is speculation that is difficult to test. D) An observation explains why nature does something. E) A scientific law summarizes a series of related observations.

E) A scientific law summarizes a series of related observations.

Which of the following statements is FALSE according to Dalton's Atomic Theory? A) Atoms combine in simple whole number ratios to form compounds. B) All atoms of chlorine have identical properties that distinguish them from other elements. C) One carbon atom will combine with one oxygen atom to form a molecule of carbon monoxide. D) Atoms of sodium do not change into another element during chemical reaction with chlorine. E) An atom of nitrogen can be broken down into smaller particles that will still have the unique properties of nitrogen.

E) An atom of nitrogen can be broken down into smaller particles that will still have the unique properties of nitrogen.

Use the molecular orbital diagram shown to determine which of the following is LEAST stable. A) C22⁺ B) O22⁺ C) B2 D) C22⁻ E) B2⁺

E) B2⁺

Which of the following represents a valid hypothesis? A) Neon does not react with oxygen. B) Sodium metal reacts violently with water. C) Lead is soft and malleable. D) Oxygen is a gas at room temperature. E) Metals tend to lose electrons.

E) Metals tend to lose electrons.

What species is represented by the following information? p+ = 12 n° = 14 e- = 10 A) Si4+ B) Mg C) Ne D) Si E) Mg2+

E) Mg2+

Which of the following statements about isotopes is TRUE? A) Isotopes of the same element differ only in the number of electrons they contain. B) An isotope of an atom with a larger number of neutrons is larger than an isotope of the same atom that contains fewer neutrons. C) Isotopes of the same element have the same mass. D) Isotopes of the same element don't usually have the same properties. E) Some elements have 3 or more naturally occurring isotopes.

E) Some elements have 3 or more naturally occurring isotopes.

Give the electron geometry (eg), molecular geometry (mg), and hybridization for IF4+. A) eg = tetrahedral, mg = tetrahedral, sp3 B) eg = trigonal pyramidal, mg = trigonal pyramidal, sp3 C) eg = octahedral, mg = square planar, sp3d2 D) eg = octahedral, mg = octahedral, sp3d2 E) eg = trigonal bipyramidal, mg = seesaw, sp3d

E) eg = trigonal bipyramidal, mg = seesaw, sp3d