Quiz 1 (Labs 1-4)

Question 1

Depend on the amount of substance present

Answer 1

Extensive Properties

Question 2

Do not depend on the amount of the substance

Answer 2

Intensive Properties

Question 3

What are some examples of extensive properties?

Answer 3

Mass
Volume
Distance
Area
Time

Question 4

What are some examples of intensive properties?

Answer 4

Temperature
Pressure
Density
percentage
concentration

Question 5

What is the formula for finding density?

Answer 5

D=m/v

Question 6

Define precision

Answer 6

a measure of how close multiple measurements of the same item are to each other

Question 7

Define accuracy

Answer 7

Shows how close your measurement is to the accepted or true value.

Question 8

What is the formula for actual error?

Answer 8

Actual error= Experimental value - Accepted value

Question 9

What is the formula for % error for experiment 2, “Mass and volume relationships”?

Answer 9

% error= experimental value- accepted value/accepted value X 100

Question 10

Process of converting reactants to products

Answer 10

Chemical reaction

Question 11

The outcome of a chemical reaction is called?

Answer 11

Products

Question 12

Products of a chemical reaction are made from other materials called?

Answer 12

Reactants

Question 13

what is the formula for sodium carbonate ?

Answer 13

Na2CO3

Question 14

What is the formula for Potassium nitrate?

Answer 14

KNO3

Question 15

What is the formula for Sodium hydroxide?

Answer 15

NaOH

Question 16

What is the formula for Potassium iodide?

Answer 16

Kl

Question 17

What is the formula for Hydrochloric acid?

Answer 17

HCl

Question 18

What is the formula for Cobalt (II) chloride?

Answer 18

CoCl2

Question 19

What is the formula for Copper (II) nitrate?

Answer 19

Cu(NO3)2

Question 20

What is the formula for Silver nitrate?

Answer 20

AgNO3

Question 21

What is the formula for Acetic acid?

Answer 21

CH3COOH

Question 22

What are some things that can happen during a chemical reaction?

Answer 22

Gas production
Temperature change
Color change
Formation of precipitate
Odor change

Question 23

A combination of two or more physically combined substances, not chemically bonded.

Answer 23

Mixture

Question 24

the process of separation of liquid from solid and other immiscible liquids, by removing the liquid layer at the top from the layer of solid or liquid below

Answer 24

Decantation

Question 25

When the mixture is poured through the filter, the solid or residue remains on the filter while the liquid passes through the filter.

Answer 25

Filtration

Question 26

What are two techniques used to separate a mixture?

Answer 26

Sublimation & Extraction

Question 27

One component of a mixture is preferentially dissolved in a suitable solvent. The dissolved component in the chosen solvent is removed as part of a the solution, while the insoluble components remain undissolved.

Answer 27

Extraction

Question 28

The transformation process from a solid state to a gas state without passing through an intermediate liquid phase. (Iodine, carbon dioxide, naphthalene, and ammonium chloride)

Answer 28

Sublimation

Question 29

In experiment 4, what components did you separate?

Answer 29

Ammonium chloride, sodium chloride and sand (SiO2)

Question 30

According to the law of conservation:

Answer 30

The sum of the masses of the three components should equal the mass of the original sample.

Question 31

In the three separate measurements, the length of the strip of zinc is found to be (1) 11.3 cm, (2) 11.4 cm, and (3) 11.2 cm. How would you calculate the average?

Answer 31

Add all three and divide by the total number of measurements. In this case that would be 3.

Question 32

In the three separate measurements, the length of the strip of zinc is found to be (1) 11.3 cm, (2) 11.4 cm, and (3) 11.2 cm. How would you calculate the average deviation?

Answer 32

Take the average and subtract from each one. Then sum over the absolute values and then divide by the total number of measurements.

Question 33

% of component =

Answer 33

mass of component in mixture/ mass of original sample X 100

Question 34

(Law of conservation ) % recovery =

Answer 34

mass of matter recovered/ mass of original sample X 100