Part I Chemistry 1st Semester Safety & Ch 1 -Ch 2

Question 1

A statement that can be tested experimentally is a

Accepted Answer

hypothesis.

Question 2

The study of the chemistry of living things is

Accepted Answer

biochemistry

Question 3

The two most important properties of all matter are

Accepted Answer

taking up space and having mass.

Question 4

The SI base unit for length is the

Accepted Answer

meter.

Question 5

The graphs of two variables that are inversely proportional to one another is

Accepted Answer

a hyperbola.

Question 6

A measure of the quantity of matter is

Accepted Answer

mass.

Question 7

The symbols for units of length in order from largest to smallest are

Accepted Answer

km, m, cm, mm.

Question 8

Which of these is a measure of Earth's gravitational pull on matter?

Accepted Answer

weight

Question 9

A volume of 1 milliliter is equivalent to

Accepted Answer

1 cubic centimeter.

Question 10

Which of the following is an intensive property of matter?

Accepted Answer

density

Question 11

The number of significant figures in the measured value 0.032 0 g is

Accepted Answer

3.

Question 12

Inorganic chemistry is

Accepted Answer

non-carbon related compounds.

Question 13

All of the following are steps in the scientific method except

Accepted Answer

discarding data inconsistent with the hypothesis.

Question 14

Which of the following observations is quantitative?

Accepted Answer

The liquid boils at 100°C.

Question 15

How many significant digits should be shown in the product of 1.6 cm and 2.4 cm?

Accepted Answer

2

Question 16

When 64.4 is divided by 2.00, the correct number of significant figures in the result is

Accepted Answer

3.

Question 17

An atom is

Accepted Answer

smallest unit of matter that maintains its chemical identity

Question 18

How is the measurement 0.000 065 cm written in scientific notation?

Accepted Answer

6.5 x 10–5 cm

Question 19

Which of the following is an extensive property of matter?

Accepted Answer

volume

Question 20

A state of matter in which a material has no definite shape but has a definite volume is the

Accepted Answer

liquid state

Question 21

The number of significant figures in the measurement 2010 cm is

Accepted Answer

3.

Question 22

The number of significant figures in the measurement 0.000 305 kg is

Accepted Answer

3.

Question 23

The graph of two variables that are directly proportional to one another is

Accepted Answer

a straight line.

Question 24

The standard base unit for mass is the

Accepted Answer

kilogram.

Question 25

The quantity of matter per unit volume is

Accepted Answer

density.

Question 26

How long should you flush with water if a chemical gets in your eyes?

Accepted Answer

15 minutes

Question 27

Under ordinary conditions of temperature and pressure, the particles in a gas are

Accepted Answer

very far from one another.

Question 28

When must eye protection be worn in the chemistry lab?

Accepted Answer

both a and b

Question 29

Which of the following observations is qualitative?

Accepted Answer

both b and c

Question 30

The symbol mm represents

Accepted Answer

millimeter.

Question 31

Which of these is not an SI base unit?

Accepted Answer

liter

Question 32

The measurement 0.020 L is the same as

Accepted Answer

2.0 x10–2 L.

Question 33

Which of these measurements has been expressed to three significant figures?

Accepted Answer

0.202 g

Question 34

If a mixture is uniform in composition, it is said to be

Accepted Answer

homogeneous.

Question 35

A homogeneous mixture is also called

Accepted Answer

a solution.

Question 36

Which of these symbols represents a unit of volume?

Accepted Answer

all of these

Question 37

A solid substance is always

Accepted Answer

always the same shape regardless of its container.

Question 38

Repeated measurements that agree closely but differ widely from the accepted value are said to

Accepted Answer

be precise, but not accurate.

Question 39

Which of these is a measure of the amount of material?

Accepted Answer

mass

Question 40

A theory is accepted as the explanation of an observed phenomenon until

Accepted Answer

repeated observations conflict with the theory.

Question 41

The measurement 0.035550 g rounded off to two significant figures would be

Accepted Answer

0.036 g.

Question 42

The SI base unit for time is the

Accepted Answer

second.

Question 43

Which pair of quantities determines the density of a material?

Accepted Answer

volume and mass

Question 44

A substance, made of two or more atoms chemically bonded, that can be broken down is a(n)

Accepted Answer

compound

Question 45

What precaution(s) must be taken with working with an open flame in the lab?

Accepted Answer

all of these

Question 46

Which of the following is not a physical change?

Accepted Answer

burning

Question 47

Organic chemistry is the study of

Accepted Answer

carbon-containing compounds.

Question 48

Which of these measurements has only nonsignificant zeros?

Accepted Answer

0.0037 mL

Question 49

A measurement that closely agrees with an accepted value is best described as

Accepted Answer

accurate.

Question 50

A plausible explanation of a body of observed natural phenomena is a scientific

Accepted Answer

theory.

Question 51

If a mixture is not uniform throughout, it is called

Accepted Answer

heterogeneous.

Question 52

Which of the following is not a chemical change?

Accepted Answer

melting

Part I Chemistry 1st Semester Safety & Ch 1 -Ch 2

Questions 52

Part I Chemistry 1st Semester Safety & Ch 1 -Ch 2

Questions 52