Chem Lab 1 Quiz

Front 1

chemistry

Back 1

the study of matter and the transformation it undergoes

Front 2

matter

Back 2

anything that occupies space and has mass

Front 3

solids

Back 3

rigid shape, fixed volume. external shape reflects atomic and molecular arrangement

Front 4

liquids

Back 4

no fixed shape, may not fill a container completely

Front 5

gases

Back 5

expand to fill container, good theoretical understanding

Front 6

macroscopic

Back 6

what we can see

Front 7

particulate

Back 7

what we cannot see

Front 8

chemical elements

Back 8

pure substances that cannot be decomposed by ordinary means to other substances.

Front 9

atom

Back 9

smallest particle of an element that has its chemical properties. it consists of a nucleus (protons and nuetrons) and electrons in space about the nucleus.

Front 10

molecule

Back 10

smallest unit of a compound that retains the chemical characteristics of the compound.

Front 11

kinetic nature

Back 11

how fast particles move in space.

Front 12

compound

Back 12

when elements form a bond. elements form compounds.

Front 13

mixture

Back 13

when elements coexist but dont form a bond.

Front 14

physical properties

Back 14

color, melting and boiling point, density, and odor

Front 15

density

Back 15

a physical property; D=m/v; it is an intensive property of matter; depends on temp; it depends on the temperature of the smaple, usually the volume inc when the temp inc which dec the density.

Front 16

intensive property

Back 16

does not depend on quantity of matter: density, temp

Front 17

extensive property

Back 17

depends on quantity of matter: mass, volume

Front 18

physical changes

Back 18

the changes in physical properties. the identity of the substance is preserved.

Front 19

chemical change/ chemical reaction

Back 19

transformation of one or more atoms or molecules into one or more different molecules

Front 20

qualitative

Back 20

observations of rxns based on color and physical state

Front 21

quantitative

Back 21

measurements which involve numbers

Front 22

SI units

Back 22

(based on metric system) temp, length, mass, and time

Front 23

fahrenheit b/f pt.

Back 23

boling 212*F
180*F
Freezing 32*F

Front 24

celsius b/f pt.

Back 24

boiling 100*C
100*C
freezing 0*C

Front 25

kelvin b/f pt.

Back 25

boiling 373*K
100*K
freezing 273*K

Front 26

kelvin formula

Back 26

K= C+273

Front 27

Celcius formula

Back 27

C= K-273
C= (F-32)/1.8

Front 28

Fahrenheit formula

Back 28

F= (1.8)(C)+32

Front 29

determinate error

Back 29

caused by faulty instruments and/or human error

Front 30

indeterminate error

Back 30

inknown cause and cannot be controlled by the scientist.

Front 31

error=

Back 31

expt. detd. value - accepted value

Front 32

percent error=

Back 32

(error)/(accepted value)x 100