Chem dimensionalysis quiz

Question 1

Measuring

Answer 1

comparing an unknown amount to a standard unit

Question 2

All measurements have 2 parts:

Answer 2

Number and measurement unit

Question 3

Metric system consists of 7 basic units. What are 5

Answer 3

Length: Meter
Mass: gram
Time: Second
Temperature (absolute): kelvin
Number of particles: mole

Question 4

Kilo

Answer 4

(10)³

Question 5

Centi

Answer 5

(10)²

Question 6

Milli

Answer 6

(10)³

Question 7

Nano

Answer 7

(10)⁹

Question 8

Which is longer 5 meters or 5 centimeters

Answer 8

5 meters

Question 9

Which is heavier in mass
A) 42 grams
B) 42 milligrams
C) 42 kilograms
D) All the same

Answer 9

C

Question 10

Which measurement is shorter? 5 millimeters or 9 nanometers

Answer 10

9 nanometers

Question 11

Conversion factor

Answer 11

The number you use to change from one unit to another
Ex: 12 inches- 1 foot

Question 12

Whatever you do there will always be some _________ involved with any measurement

Answer 12

Uncertainty

Question 13

Accuracy

Answer 13

How close a measurement is to the exact value

Question 14

Precision

Answer 14

How repeatable a measurement is/how close measurements are

Question 15

What’s important when reporting measurements

Answer 15

Integrity

Question 16

Which data is precise
A) 2.15; 3.14; 4.5; 3.9; 5.0
B) 3.0; 2.5; 2.75; 3.5; 1.7
C) 4.0; 4.2; 4.44; 4.15; 4.3

Answer 16

C

Question 17

Which data is precise and accurate (True value 3.2)
A) 2.1; 2.09; 2.15; 2.11
B) 3.19; 3.21; 3.25; 3.22
C) 3.0; 2.5; 2.75; 3.5; 1.7

Answer 17

B

Question 18

Significant digits

Answer 18

Report measurements to one tenth of the smallest decimal increment

Question 19

Significant digits only apply to

Answer 19

Measured data

Question 20

How many significant digits are in 342

Answer 20

3

Question 21

How many significant digits are in 34200

Answer 21

3

Question 22

How many significant digits in 342.0

Answer 22

4

Question 23

How many significant digits in 242.06

Answer 23

5

Question 24

Density

Answer 24

Mass over volume