Deck 2: The Chemical View of Matter

Question 1

Alfred Nobel ____________?

A) discovered dynamite
B) proposed the metric system
C) developed the STM, scanning tunneling microscope
D) discovered kinetic energy

Answer 1

discovered dynamite

Question 2

Sublimation is a characteristic physical property of

A) chlorine (Cl₂, liquid).
B) oxygen (O₂, gas).
C) bromine (Br₂, liquid).
D) iodine (I₂, solid).

Answer 2

iodine (I₂, solid).

Question 3

Which mixture is heterogeneous?

A) salt and water
B) water and oil
C) sweetened hot tea
D) Ivory soap bar

Answer 3

water and oil

Question 4

Which of the following sets, is a list of the symbols for an element and a compound (in that order)?

A) Mg, CO
B) CO, CO₂
C) CO, Co
D) H₂O₂, P

Question 5

Most samples of matter occur in nature as

A) elements.
B) compounds.
C) homogeneous samples.
D) mixtures.

Question 6

Which statement describes a physical property of oxygen?

A) Oxygen supports burning of gasoline.
B) Oxygen has a density of 0.0014 g/mL.
C) Oxygen is required for human metabolism of food.
D) Oxygen combines with iron causing the formation of rust.

Question 7

Which of the following is not one of the common states of matter?

A) solid
B) plasma
C) liquid
D) gas

Question 8

What information is not provided by the formula, C₄H₁₀, for butane?

A) butane being an organic compound
B) the molecular formula
C) the relative number of atoms of each kind
D) the shape of the molecule

Question 9

Which of the following sets, is a list of the symbols that could represent the following substances, respectively? lead a compound of equal parts hydrogen and oxygen elemental oxygen

A) PB, H₂O₂, O
B) Pb, HO, O
C) Pb, H₂O₂, O₂
D) PB, HO, O₂

Question 10

Which is not a mixture?

A) pure water
B) mayonnaise
C) strawberry Kool-Aid^® drink
D) rock

Question 11

A process is probably a chemical reaction if

A) it produces light.
B) a solid appears when two solutions are mixed.
C) bubbles start to form when two substances are mixed.
D) all of these

Question 12

Which of the following is one of the classes of pure substances?

A) compound
B) homogeneous mixture
C) solution
D) heterogeneous mixture

Question 13

In the balanced equation, 2 Al + 6 HCl $\to$ 2 AlCl₃ + 3 H₂, the sum of the coefficients of the reactants is

A)5
B)8
C)13
D)none of these

Question 14

The element whose name is derived from the Latin aurum, meaning shining dawn

A) gold.
B) aluminum.
C) silver.
D) chromium.

Question 15

Separating a mixture of iron and sulfur can be done

A) by filtration.
B) dissolving in water.
C) with a magnet.
D) by burning.

Question 16

Which is a chemical property?

A) boiling point
B) state
C) odor
D) flammability

Question 17

Which of the following is not a chemical change?

A) burning charcoal
B) rusting iron
C) melting ice
D) baking bread

Question 18

The equation, 2 C(s) + O₂(g) $\to$ 2 CO(g), tells us

A) the number of atoms of each kind in reactants and products is the same.
B) carbon monoxide (CO) is a product.
C) two atoms of carbon undergo reaction.
D) all of these

Question 19

Which term describes energy?

A) motion
B) heat
C) light
D) all of these

Question 20

Which of the following elements is a metal?

A) Ca, calcium
B) Na, sodium
C) Hg, mercury
D) all of these

Question 21

How would you separate a mixture of salt, sand, and water?

A) by filtration, followed by evaporation
B) freezing, followed by melting
C) separating with tweezers, followed by evaporation
D) by filtration, followed by burning

Question 22

What prefix is the largest?

A) mega
B) centi
C) micro
D) kilo

Question 23

Potential energy is defined as

A) heat energy.
B) energy associated with motion.
C) stored energy.
D) the ability to do work.

Question 24

For which of the following is it necessary that there be a definite composition which cannot vary?

A) mixture
B) solution
C) compound
D) colloid

Question 25

The quantity 10^-9 (one billionth) is designated by the prefix

A) pico.
B) nano.
C) centi.
D) mega.

Question 26

Which of the following is not a pure substance?

A) pure gold
B) clean air
C) refined sugar
D) distilled water

Question 27

Which of the following would convert 15 L of gasoline to gallons? (1.06 qt = 1 L ; 4 qts = 1 gal)

A) (15) (1.06/1) (1/4)
B) (15) (1/1.06) (4/1)
C) (15) (1.06/1) (4/1)
D) (15) (1/1.06) (1/4)

Question 28

Which state of matter is composed of charged particles which are dramatically affected by electric and magnetic fields?

A) solids
B) liquids
C) gases
D) plasmas

Question 29

How many chemical formulas are in this chemical equation? P₄(s) + 6 F₂(g) $\to$ 4 PF₃(g)

A) 2
B) 3
C) 4
D) 11

Question 30

How does the known number of nonmetals compare to that of metals?

A) There are fewer metals.
B) There are an equal number of each.
C) There are fewer nonmetals.
D) This cannot be predicted because not all metals and nonmetals have been discovered.

Question 31

A person weighs 165 lbs. Which of the following would calculate their mass in kilograms if 2.2 lbs = 1 kg?

A) 165 $\times$ 2.2
B) 165 ÷ 2.2
C) 2.2 ÷ 165
D) 165 + 2.2

Question 32

Which of the following is a compound?

A) mercury
B) blood
C) sugar
D) air

Question 33

Which of the following is a physical property?

A) freezing point
B) color
C) odor
D) all of the above

Question 34

Which of the following is a physical change?

A) souring of milk
B) ripening of fruit
C) frying an egg
D) melting

Question 35

A pure substance which can be decomposed into two or more pure substances is a(n)

A) element.
B) compound.
C) mixture.
D) colloid.

Question 36

Which of the following is an SI unit of ?

A) pound
B) kilogram
C) quart
D) calorie

Question 37

How many phosphorus atoms are in the formula H₃PO₄?

A) 4
B) 3
C) 7
D) 1

Question 38

The simplest form of matter is a(n)

A) element.
B) mixture.
C) compound.
D) solution.

Question 39

How many categories of pure substances exist?

A) 2
B) 3
C) thousands
D) about 100

Question 40

An example of a homogeneous mixture is

A) oil in water.
B) a salt water solution.
C) a suspension.
D) a pure substance.

Question 41

The chemical symbol for copper is_________.

Question 42

Which of the following has the highest kinetic energy?

A) boulder on the top of hill
B) water behind a dam
C) a ball falling from a 3 story building
D) a piece of wood

Question 43

Which of the following is an example of a chemical change?

A) boiling water
B) iodine sublimating
C) barbecuing a steak
D) breaking a piece of glass

Question 44

There are ____________mg in exactly 10g.

Question 45

Identify the nonmetal among those listed below.

A) Fe
B) Na
C) S
D) Ag

Question 46

Glucose has the chemical formula C₆H₁₂O₆. In one molecule of glucose there are 24 atoms.

Question 47

Mg is the chemical symbol for ____________________.

Question 48

The SI multiple of 10^-3 is indicated in a unit with the common prefix _________.

Question 49

The most common unit of volume used in chemistry is the millimeter.

Question 50

MATCHING
Use the pictures below to answer the following questions.

Which figure above depicts a heterogeneous mixture?

A)
B)
C)
D)

Question 51

What is the coefficient in front of iron when the following equation is balanced? Fe + O₂ $\to$ Fe₂O₃

A) 1
B) 2
C) 4
D) 6

Question 52

A pure substance which can be decomposed into two or more pure substances is called a mixture.

Question 53

What kind of change is depicted in the following image?

A) chemical change
B) physical change
C) both a chemical change and a physical change
D) There is no change shown in the image.

Question 54

MATCHING
Use the pictures below to answer the following questions.

Which figure above depicts an element?

A)
B)
C)
D)

Question 55

MATCHING
Use the pictures below to answer the following questions.

Which figure above depicts a compound?

A)
B)
C)
D)

Question 56

How many millimeters are in 100 cm?

A) 10
B) 1000
C) 100
D) 1

Question 57

MATCHING
Use the pictures below to answer the following questions.

Which figure above depicts a homogeneous mixture?

A)
B)
C)
D)

Question 58

The density of copper is 8.96 g/mL and that of gold is 19.3 g/mL. The ratio of the mass of a 10 mL block of copper to a 10 mL block of gold is 0.464.

Question 59

In order to convert a measurement for the element mercury from mass to volume, one would multiply the starting measurement by the following factor.