Deck 2: The Chemical View of Matter

Question 1

Which of the following sets, is a list of the symbols for: lead, a compound of equal parts hydrogen and oxygen, and elemental oxygen?

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

Answer 1

Pb, H₂O₂, O₂

Question 2

Separating a mixture of iron and sulfur can be done

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

Answer 2

with a magnet

Question 3

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

Answer 3

all of these

Question 4

Which is not a mixture?

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

Question 5

Which statement describes a physical property of oxygen?

A) oxygen supports burning of gasoline
B) oxygen has a density of l.4 g/mL
C) oxygen is required for human metabolism of food
D) oxygen combines with iron causing the formation of rust

Question 6

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

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

Question 7

Which is a chemical property?

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

Question 8

Which of the following elements is a metal?

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

Question 9

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

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

Question 10

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 11

Which term describes energy?

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

Question 12

Which mixture is heterogeneous?

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

Question 13

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

A) element
B) mixture
C) compound
D) atom

Question 14

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

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

Question 15

The symbol for magnesium is

A) Ma
B) Mg
C) Mm
D) Mn

Question 16

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

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

Question 17

Alfred Nobel ____________?

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

Question 18

Sublimation is a characteristic physical property of

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

Question 19

Most samples of matter occur in nature as

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

Question 20

Which of the following is not a chemical change?

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

Question 21

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 22

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 23

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

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

Question 24

Which of the following is not a pure substance?

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

Question 25

How many categories of pure substances exist?

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

Question 26

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 27

How many milligrams are there in 10 grams?

A) 10³
B) 10^-6
C) 10^-3
D) 10⁴

Question 28

An example of a homogeneous mixture is

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

Question 29

Which of the following is an SI unit?

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

Question 30

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

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

Question 31

Which of the following is a physical change?

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

Question 32

Potential energy is defined as

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

Question 33

A person weighs 165 lbs.What is the weight in kilograms if 2.2 lbs = 1 kg?

A) 165 * 2.2
B) 165 ÷ 2.2
C) 2.2 ÷ 165
D) 165 + 2.2

Question 34

How many phosphorus atoms are in the formula H₃PO₄?

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

Question 35

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

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

Question 36

Which prefix has the meaning 10^-3?

A) mega
B) nano
C) centi
D) milli

Question 37

The equation, 2 C(s) + O₂(g) $\rightarrow$ 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 38

What prefix is the largest?

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

Question 39

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 40

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) unknown because not all metals and nonmetals have been discovered

Question 41

Which is a physical property?

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

Question 42

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 43

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 44

How many millimeters are in 100 cm?

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

Question 45

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

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

Question 46

The simplest form of matter is a(n)

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

Question 47

What element has the symbol Cu?

A) cobalt
B) carbon
C) copper
D) chromium

Question 48

Which is a compound?

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

Question 49

Identify the nonmetal?

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

Question 50

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