General Chemistry Exam 1

Which combination of protons, neutrons, and electrons is correct for the isotope of copper, Cu A) 29 p+, 34 n°, 29 e- B) 29 p+, 29 n°, 63 e- C) 63 p+, 29 n°, 63 e- D) 34 p+, 29 n°, 34 e- E) 34 p+, 34 n°, 29 e-

A) 29 p+, 34 n°, 29 e-

Which one of the following is the highest temperature? A) 38 °C B) 96 °F C) 302 K D) none of the above E) the freezing point of water

A) 38 °C

7.7 seconds contain this many picoseconds. A) 7.7 × 10^12 B) 7.7 × 10^-12 C) 7.7 × 10^-9 D) 7.7 × 10^9 E) 7.7 × 10^15

A) 7.7 × 10^12

If the Thomson model of the atom had been correct, Rutherford would have observed: A) Alpha particles going through the foil with little or no deflection. B) Alpha particles greatly deflected by the metal foil. C) Alpha particles bouncing off the foil. D) Positive particles formed in the foil. E) None of the above observations is consistent with the Thomson model of the atom.

A) Alpha particles going through the foil with little or no deflection.

Which one of the following compounds is chromium(III) oxide? A) Cr2O3 B) CrO3 C) Cr3O2 D) Cr3O E) Cr2O4

A) Cr2O3

The first scientist to show that atoms emit any negative particles was A) J. J. Thomson B) Lord Kelvin C) Ernest Rutherford D) William Thomson E) John Dalton

A) J. J. Thomson

A solution is also called a A) homogeneous mixture B) heterogeneous mixture C) pure mixture D) compound E) distilled mixture

A) homogeneous mixture

Precision refers to ________. A) how close a measured number is to other measured numbers B) how close a measured number is to the true value C) how close a measured number is to the calculated value D) how close a measured number is to zero E) how close a measured number is to infinity

A) how close a measured number is to other measured numbers

Order the four metric prefixes from smallest to largest. A) nano- < milli- < centi- < kilo- B) milli- < nano- < centi- < kilo- C) kilo- < centi- < nano- < milli- D) kilo- < centi- < milli- < nano- E) centi- < nano- < kilo- < milli-

A) nano- < milli- < centi- < kilo-

The correct name for HNO2 is ________. A) nitrous acid B) nitric acid C) hydrogen nitrate D) hyponitrous acid E) pernitric acid

A) nitrous acid

In the Rutherford nuclear-atom model, ________. A) the heavy subatomic particles, protons and neutrons, reside in the nucleus B) the three principal subatomic particles (protons, neutrons, and electrons) all have essentially the same mass C) the light subatomic particles, protons and neutrons, reside in the nucleus D) mass is spread essentially uniformly throughout the atom E) the three principal subatomic particles (protons, neutrons, and electrons) all have essentially the same mass and mass is spread essentially uniformly throughout the atom

A) the heavy subatomic particles, protons and neutrons, reside in the nucleus

The length of the side of a cube having a density of 12.6 g/ml and a mass of 7.65 g is ________ cm. A) 3.20 B) 0.847 C) 1.02 D) 0.584 E) 1.32

B) 0.847

Which of the following metric relationships is incorrect? A) 1 microliter = 10-6 liters B) 1 gram = 103 kilograms C) 103 milliliters = 1 liter D) 1 gram = 102 centigrams E) 10 decimeters = 1 meter

B) 1 gram = 103 kilograms

1 picometer = ________ centimeters A) 1 × 1010 B) 1 × 10-10 C) 1 × 108 D) 1 × 10-8 E) 1 × 10-12

B) 1 × 10-10

5.6 kilogram(s) contains this many grams. A) 5.6 × 10^2 B) 5.6 × 10^3 C) 56 D) 0.56 E) 5.6 × 10^-3

B) 5.6 × 10^3

In the symbol below, X = ________. (13 top, 6 bottom) X A) N B) C C) Al D) K E) not enough information to determine

B) C

A method of separation that employs a system with two phases of matter, a mobile phase and a stationary phase, is called A) filtration B) chromatography C) distillation D) vaporization E) homogenization

B) chromatography

A combination of sand, salt, and water is an example of a ________. A) homogeneous mixture B) heterogeneous mixture C) compound D) pure substance E) solid

B) heterogeneous mixture

In the periodic table, the elements are arranged in ________. A) alphabetical order B) order of increasing atomic number C) order of increasing metallic properties D) order of increasing neutron content E) reverse alphabetical order

B) order of increasing atomic number

The boiling of water is a A) physical change because the water merely disappears B) physical change because the gaseous water is chemically the same as the liquid C) chemical change because heat is needed for the process to occur D) chemical change because a gas (steam) is given off E) chemical and physical damage

B) physical change because the gaseous water is chemically the same as the liquid

Which one of the following is an intensive property? A) mass B) temperature C) heat content D) volume E) amount

B) temperature

In the following list, only ________ is not an example of a chemical reaction. A) dissolution of a penny in nitric acid B) the condensation of water vapor C) a burning candle D) the formation of polyethylene from ethylene E) the rusting of iron

B) the condensation of water vapor

45 m/s = ________ km/hr A) 2.7 B) 0.045 C) 1.6 × 102 D) 2.7 × 103 E) 1.6 × 105

C) 1.6 × 102

Using the rules of significant figures, calculate the following: (6.167+85)\6.10 A) 14.7 B) 16 C) 15 D) 83 E) 14.74

C) 15

_________ are substances with constant composition that can be broken down into elements by chemical processes. A) Solutions B) Mixtures C) Compounds D) Quarks E) Heterogeneous mixtures

C) Compounds

The scientist whose alpha-particle scattering experiment led him to conclude that the nucleus of an atom contains a dense center of positive charge is A) J. J. Thomson B) Lord Kelvin C) Ernest Rutherford D) William Thomson E) John Dalton

C) Ernest Rutherford

Which one of the following has the element name and symbol correctly matched? A) S, sodium B) Tn, tin C) Fe, iron D) N, neon E) B, bromine

C) Fe, iron

For which of the following can the composition vary? A) pure substance B) element C) both homogeneous and heterogeneous mixtures D) homogeneous mixture E) heterogeneous mixture

C) both homogeneous and heterogeneous mixtures

The law of constant composition applies to ________. A) solutions B) heterogeneous mixtures C) compounds D) homogeneous mixtures E) solids

C) compounds

Of the following, the smallest and lightest subatomic particle is the ________. A) neutron B) proton C) electron D) nucleus E) alpha particle

C) electron

Cathode rays are ________. A) neutrons B) X-rays C) electrons D) protons E) atoms

C) electrons

The degree of agreement among several measurements of the same quantity is called __________. It reflects the reproducibility of a given type of measurement. A) accuracy B) error C) precision D) significance E) certainty

C) precision

Express the volume 239.7 cm^3 in liters. A) 239.7 L B) 23.97 L C) 2.397 L D) 0.2397 L E) 0.02397 L

D) 0.2397 L

Express the number 0.000216 in scientific notation. A) 216 × 10-6 B) 2.16 × 102 C) 2.16 × 104 D) 2.16 × 10-4 E) 0.216 × 10-3

D) 2.16 × 10-4

Round the number 3456.5 to two significant figures. A) 3400.0 B) 3400 C) 3000 D) 3500 E) 3000.0

D) 3500

Consider the numbers 23.68 and 4.12. The sum of these numbers has ____ significant figures, and the product of these numbers has ____ significant figures. A) 3, 3 B) 4, 4 C) 3, 4 D) 4, 3 E) none of these

D) 4, 3

A 20.0 mL sample of glycerol has a mass of 25.2 grams. What is the mass of a 57-mL sample of glycerol? A) 8.8 g B) 45 g C) 2.9 × 10^4 g D) 72 g E) 71.8 g

D) 72 g

The element rhenium (Re) exists as two stable isotopes and 18 unstable isotopes. Rhenium-185 has in its nucleus A) 75 protons, 75 neutrons B) 75 protons, 130 neutrons C) 130 protons, 75 neutrons D) 75 protons, 110 neutrons E) not enough information

D) 75 protons, 110 neutrons

An isotope, X, of a particular element has an atomic number of 16 and a mass number of 34. Therefore: A) X is an isotope of sulfur. B) X has 18 neutrons per atom. C) X has an atomic mass of 32.065. D) A and B. E) A, B, and C.

D) A and B.

Alpha particles beamed at thin metal foil may A) pass directly through without changing direction B) be slightly diverted by attraction to electrons C) be reflected by direct contact with nuclei D) A and C E) A, B, and C

D) A and C

The proper formula for the hydronium ion is ________. A) H- B) OH- C) N3- D) H3O+ E) NH4+

D) H3O+

Which formula/name pair is incorrect? A) Mn(NO2)2 manganese(II) nitrite B) Mg(NO3)2 magnesium nitrate C) Mn(NO3)2 manganese(II) nitrate D) Mg3N2 magnesium nitrite E) Mg(MnO4)2 magnesium permanganate

D) Mg3N2 magnesium nitrite

Which of the following pairs of compounds can be used to illustrate the law of multiple proportions? A) NH4 and NH4Cl B) ZnO2 and ZnCl2 C) H2O and HCl D) NO and NO2 E) CH4 and CO2

D) NO and NO2

Which of the following is an example of a quantitative observation? A) The piece of metal is longer than the piece of wood. B) Solution 1 is much darker than solution 2. C) The liquid in beaker A is blue. D) The temperature of the liquid is 60°C. E) At least two of the above (A-D) are quantitative observations.

D) The temperature of the liquid is 60°C.

A metric unit for length is A) gram B) milliliter C) yard D) kilometer E) pound

D) kilometer

The correct name for NaHCO3 is ________. A) sodium hydride B) persodium carbonate C) persodium hydroxide D) sodium bicarbonate E) carbonic acid

D) sodium bicarbonate

The distance of 33 km equals A) 0.033 m B) 0.33 m C) 330 m D) 3300 m E) 3.3 × 10^4 m

E) 3.3 × 104 m

An example of a pure substances is A) elements B) compounds C) pure water D) carbon dioxide E) all of these

E) all of these

Elements ________ exhibit similar physical and chemical properties. A) with similar chemical symbols B) with similar atomic masses C) in the same period of the periodic table D) on opposite sides of the periodic table E) in the same group of the periodic table

E) in the same group of the periodic table

The correct name for MgF2 is ________. A) monomagnesium difluoride B) magnesium difluoride C) manganese difluoride D) manganese bifluoride E) magnesium fluoride

E) magnesium fluoride

In which group do all the elements have the same number of valence electrons? A) P, S, Cl B) Ag, Cd, Ar C) Na, Ca, Ba D) P, As, Se E) none of these

E) none of these

Which measurement is expressed in non-SI units? a. 12.9 Angstroms (Å) b. 47.2 milliliters (mL) c. 16.8 kilograms (kg) d. 42.6 micrometers (µm)

a. 12.9 Angstroms (Å)

5.2cm x 7.01cm = _____cm2 a. 36 b. 36.4 c. 36.45 d. 36.452

a. 36

For an atom of fluorine, the atomic number is ___ and the average atomic mass is ___. a. 9; 18.988 amu b. 18.998; 9 amu c. 10; 19 g d. 9; 9 g

a. 9; 18.988 amu

The formula for aluminum carbonate is a. Al2(CO3)3. b. AlCO3. c. Al2C3. d. Al3(CO3)2.

a. Al2(CO3)3.

A temperature of -40 degrees Celsius is the same as (X) degrees Fahrenheit and (Y) kelvins. a. X = -40, Y = 233 b. X = 233, Y = -40 c. X = 10, Y = 233 d. X = 233, Y = 10

a. X = -40, Y = 233

Heat flows from an object a. at high temperature to an object at low temperature b. at low temperature to an object at high temperature c. to another object at the same temperature d. at high elevation to an object at low elevation

a. at high temperature to an object at low temperature

A solution with a boiling point of 105 degrees Celsius contains either sugar or salt. How would you determine which is present? a. distill the solution b. filter the solution c. use chromatography d. taste the solution

a. distill the solution

The elements found on the right side of the periodic table tend to ______ electrons. a. gain b. lose c. keep d. share

a. gain

Which acid is not an oxyacid? a. hydrochloric acid b. nitric acid c. sulfurous acid d. acetic acid

a. hydrochloric acid

LiNO3 is named a. lithium nitrate. b. lanthanum nitrate. c. lanthanum nitrite. d. lithium nitrite.

a. lithium nitrate.

The nucleus of an atom contains a. protons and neutrons b. protons and electrons c. electrons and neutrons d. protons, neutrons, and electrons

a. protons and neutrons

The measured quantity 0.0860g contains _____ significant figures. a. three b. four c. five d. six

a. three

6.03g ÷ 7.1mL = _____ g/mL a. 0.8 b. 0.85 c. 0.849 d. 0.849257

b. 0.85

A copper wire placed in a silver nitrate solution turns dark and "fuzzy." This illustrates a. an accident b. a chemical reaction c. an extensive property d. a physical change

b. a chemical reaction

When nitric acid is mixed with copper metal, a brown gas forms. This is an example of a. an accident b. a chemical reaction c. a physical property d. an extensive property

b. a chemical reaction

Which name is incorrectly paired with the formula? a. hydroxide ion; OH- b. barium(II) chloride; BaCl2 c. ammonia; NH3 d. sulfur dioxide; SO2

b. barium(II) chloride; BaCl2

Properties that describe the way a substance reacts to form other substances are called a. physical properties b. chemical properties c. homogeneous properties d. heterogeneous properties

b. chemical properties

Which unit is not an SI base unit? a. kilogram b. degree Celsius c. meter d. second

b. degree Celsius

Fe2O3 is named a. diiron trioxide. b. iron(III) oxide. c. ferrous oxide. d. ironic oxide.

b. iron(III) oxide.

Atomic weights on the periodic table are decimal numbers instead of integers because a. the number of protons + neutrons determines atomic weight. b. of the existence of isotopes. c. of the very small mass of electrons compared to protons and neutrons. d. the number of protons + electrons determines atomic weight.

b. of the existence of isotopes.

C3H8 is named a. ethane. b. propane. c. propanol. d. pentane.

b. propane.

6.9g - 5.07g = _____g a. 1.830 b. 1.83 c. 1.8 d. 1

c. 1.8

4.1g + 7.08g = _____g a. 11.180 b. 11.18 c. 11.2 d. 11

c. 11.2

Acids produce _____ ions. a. OH-1 b. OH+1 c. H+1 d. H-1

c. H+1

Positive ions are called a. positrons. b. anions. c. cations. d. nucleons.

c. cations.

Cl2O7 is named a. chlorine(VII) oxide. b. dichlorine hexaoxide. c. dichlorine heptaoxide. d. bichlorine heptaoxide.

c. dichlorine heptaoxide.

Apple juice is an example of a(an) a. element b. compound c. homogeneous mixture d. heterogeneous mixture

c. homogeneous mixture

Compounds composed only of carbon and hydrogen are called a. binary acids. b. carbohydrates. c. hydrocarbons. d. alkanes.

c. hydrocarbons.

Two atoms with the same atomic number but different mass numbers are called a. mutants b. isomers c. isotopes d. symbiots

c. isotopes

HIO4 is named a. iodic acid. b. iodous acid. c. periodic acid. d. hydrogen iodate.

c. periodic acid.

Which of the formulas below does not represent a compound that actually exists? a. CaCO3 b. H2O2 c. KMnO4 d. Na2PO3

d. Na2PO3

Select the incorrect statement about the mass and volume of an atom. a. The mass is determined mostly by the protons and neutrons. b. The volume is mostly empty space. c. The mass is concentrated in the nucleus. d. The volume is determined by the arrangement of the protons.

d. The volume is determined by the arrangement of the protons

Acetic acid that was liquid when stored was solid when a student looked for it on a cold morning. This illustrates a. a change in solubility b. a chemical change c. an equilibrium state d. a physical change

d. a physical change

Which of the following is not a pure substance? a. water b. carbon dioxide c. carbon d. air

d. air

Solutions may be a. solids b. liquids c. gases d. all of the above

d. all of the above

Descriptions of a sample that are based on the amount of substance are called a. physical properties b. chemical properties c. intensive properties d. extensive properties

d. extensive properties

The elements located in Group VIIA (Group 17) on the periodic table are called a. alkali metals. b. noble gases. c. chalcogens. d. halogens.

d. halogens.

Metals and nonmetals react to form ________ compounds. a. molecular b. mixed c. empirical d. ionic

d. ionic

NaOCl is named a. sodium chlorate. b. sodium chlorite. c. sodium perchlorate. d. sodium hypochlorite.

d. sodium hypochlorite.