Density and Relative Density

Question 1

which of the three are physical change
~natural gas burning
~steel rusting
~lead melting

Answer 1

lead melting

Question 2

density of CH4 gas

Answer 2

imperial 0.0456 lb/ft cu

metric 0.774 kg/m cu

Question 3

flow of solder into a joint is a result of

Answer 3

capillary action

Question 4

density of water

Answer 4

62.4 lb/ft cu, 10 lb/imp gal, 8.33 lb/US gal, 1000 kg/m cu, 1 kg/L

Question 5

mercury in a glass tube could be classified as

• adhesive
• cohesive

Answer 5

cohesive

Question 6

relative density of mercury

Answer 6

13.6

Question 7

density of C3H8 gas

Answer 7

imperial 0.114 lb/ft cu

metric 1.935 kg/m cu

Question 8

density has what where relative density doesnt

Answer 8

units (kg/m cu and lb/ft cu

Question 9

density of CH4 liquid

Answer 9

imperial 4.24 lb/ft cu

metric 0.424 kg/m cu

Question 10

viscous means

Answer 10

resists shearing or flow

Question 11

density of C3H8 liquid

Answer 11

imperial 5.05 lb/gal

metric 0.508 kg/L

Question 12

imperial gallon of water

Answer 12

10 lb/gal

Question 13

density of water in kg and lb

Answer 13

1000kg and 62.4 lb

Question 14

what is the difference between a compound and a mixture

Answer 14

compound is a chemically union of different molecules while a mixture contains different molecules of different elements but not chemically united.

Question 15

mass=

Answer 15

density x volume

Question 16

air at standard temp & pressure

Imperial and Metric

Answer 16

imperial 0.076 lb/ft cu, metric 1.29 kg/m cu

Question 17

density=

Answer 17

mass/volume

Question 18

definition of surface tension

Answer 18

molecular attraction of the molecules to each other at the surface of the liquid

Question 19

definition of density

Answer 19

mass per unit of volume

Question 20

relative density of propane gas and natural gas

Answer 20

propane 1.5 natural gas 0.6

Question 21

how does a pressure cooker reduce cooking times

Answer 21

increased pressure and increase temperature

Question 22

density of a solid object with a relative density of 3.5 is

Answer 22

1.5 lb/ft cu

Question 23

definition of relative density for liquids and solids

Answer 23

mass of a substance compared to the mass of an equal volume of water

Question 24

which of the following is most dense

• copper
• steel
• mercury

Answer 24

mercury

Question 25

liquid dish washing detergent could be classified as? - adhesive - cohesive

Answer 25

adhesive

Question 26

when is water most dense

Answer 26

39* F 4*C

Question 27

which of the following is a chemical change ~separation of water into hydrogen and oxygen ~water turning into steam ~solder being liquefied

Answer 27

separation of water into hydrogen and oxygen

Question 28

diffusion means

Answer 28

spreading automatically

Question 29

tenacious means

Answer 29

resists deformation, strong

Question 30

formula to find relative density

Answer 30

RD= Density/Density of water

Question 31

relative density of water to air

Answer 31

1-1

Question 32

volume=

Answer 32

mass/density

Question 33

ductile means

Answer 33

may be stretched or drawn to shape

Question 34

mass of one gallon of water

Answer 34

8.33 lb/gal

Question 35

two factors that affect the state in which matter exists are

Answer 35

pressure and density

Question 36

density of propane gas

Answer 36

1.5

Question 37

what is the difference between an element and a compound

Answer 37

compound is a chemically union of different molecules while an element contains only molecules of that element