multiple choice chemistry test

Which of the following activities is not a part of good science? a. proposing a theory b. developing a hypothesis c. making quantitative observations d. designing experiments e. indulging in speculation

e.

How many atoms are in 0.534 mol of nickel, Ni? A. 1.13 × 1024 atoms B. 1.48 × 1025 atoms C. 2.44 × 1022 atoms D. 3.22 × 1023 atoms E. 6.98 × 1021 atoms

D.

What is defined as the distance between identical points on successive waves? A. frequency B. amplitude C. magnitude D. wavelength E. light

D.

What is the term for the number of protons in the nucleus of each atom of an element? It also indicates the number of electrons in the atom. A. isotope number B. mass number C. mass-to-charge ratio D. atomic number E. atomic mass units

D.

Which of the following is a metal? A. nitrogen, N, Z = 7 B. phosphorus, P, Z = 15 C. arsenic, As, Z = 33 D. thallium, Tl, Z = 81 E. silicon, Si, Z = 14

D.

Which of the following statements represents an exact number? (2 answers) A. 4 dozen eggs were used to make a breakfast. B. Earth orbits the sun every 365.2564 days. C. 0.41 g of oxygen was inhaled in each breath. D. 50,871 tickets were sold at a sporting event. E. 345.7 mL of water was used to make a birthday cake.

a, d

Which of the following statements describe chemical properties? A. Oxygen gas supports combustion. B. Hydrofluoric acid reacts with glass. C. Fertilizers help to increase agricultural production. D. Water boils below 100°C on top of a mountain. E. Lead is denser than aluminum.

A,B,C

Bromine is the only nonmetal that is a liquid at room temperature. Consider the isotope bromine-81, . Select the combination which lists the correct atomic number, number of neutrons, and mass number, respectively. A. 35, 46, 81 B. 35, 81, 46 C. 81, 46, 35 D. 46, 81, 35 E. 35, 81, 116

A.

Millikan's oil-drop experiment A. established the charge on an electron B. showed that all oil drops carried the same charge. C. provided support for the nuclear model of the atom. D. suggested that some oil drops carried fractional numbers of electrons. E. suggested the presence of a neutral particle in the atom.

A.

Acetone, which is used as a solvent and as a reactant in the manufacture of Plexiglas®, boils at 56.1°C. What is the boiling point in degrees Fahrenheit? A. 159°F B. 133°F C. 101°F D. 69.0°F E. 43.4°F

B.

How many grams are present in 0.885 moles of manganese? A. 62.1 g B. 48.6 g C. 21.5 g D. 27.5 g E. 0.016 g

B.

What kind of energy results from motion? A. potential energy B. kinetic energy C. chemical energy D. electrostatic energy E. velocity

B.

When the value of something does not depend on the amount of the matter then what is this called? A. empirical property B. intensive property C. inclusive property D. extensive property E. exclusive property

B.

Which of these elements is chemically similar to magnesium? A. sulfur B. Calcium C. iron D. nickel E. potassium

B.

Which one of these represents a chemical change? A. boiling water to form steam B. turning hair yellow with bleach C. melting butter D. mixing powdered charcoal and oxygen at room temperature E. cutting a bar of sodium metal into pieces with a knife

B.

After carrying out the operation (13.7 + 0.027) ÷ 8.221, how many significant figures are appropriate to show in the result? A. 1 B. 2 C. 3 D. 4 E. 5.

C.

What is the wavelength of light having a frequency of 4.8 × 1014 s-1? (c = 3.00 × 108 m/s) A. 0.0016 nm B. 1600 m C. 630 nm D. 1600 nm E. 6.3 × 10-7 nm

C.

Which one of the following statements about atoms and subatomic particles is correct? A. rutherford discovered the atomic nucleus by bombarding gold foil with electrons B. the proton and the neutron have identical masses. C. the neutron's mass is equal to that of a proton plus an electron. D. a neutral atom contains equal numbers of protons and electrons. E. an atomic nucleus contains equal numbers of protons and neutrons.

D.

You prepare 1000. mL of tea and transfer it to a 1.00-quart pitcher for storage. Which of the following statements is true? (1 L = 1.0567 qt) A. the pitcher will be filled to 100% of its capacity with no tea spilled. B. the pitcher will be filled to about 95% of its capacity. C. the pitcher will be filled to about 50% of its capacity. D. the pitcher will be completely filled and a small amount of tea will overflow. E. The pitcher will be completely filled and most of the tea will overflow.

E

Select the arrangement of electromagnetic radiation which starts with the shortest wavelength and increases to longest wavelength. A. radio, infrared, ultraviolet, gamma rays B. radio, ultraviolet, infrared, gamma rays C. gamma rays, radio, ultraviolet, infrared D. gamma rays, infrared, radio, ultraviolet E. gamma rays, ultraviolet, infrared, radio

E.

Which is correct if 15,390,000 is rounded to two significant figures? A. 15 B. 1.5 × 10-7 C. 1.5 × 108 D. 15,400,000 E. 15,000,000

E.

The SI base unit of mass is a. mg b. g c. kg d. metric ton e. lb

c

Which of the following is a 'substance' according to the definition given in your textbook? a. air b. tap water c. sea water d. water e. toothpaste

d.

A dose of medication was prescribed to be 35 microliters. Which of the following expresses that volume in centiliters? a. 3.5 × 105 cL b. 3.5 × 104 cL c. 3.5 cL d. 3.5 × 10-4 cL e. 3.5 × 10-3 cL

e.