chem 120 final exam study guide |
127 Questions and Answers
chemistry - -the science that tries to understand how matter behaves by
studying how atoms and molecules behave
- scientific method - -ways of learning that emphasizes observation and
experimentation (self correcting)
- observation - -we go out in nature and ask questions we measure or
observe some aspect of nature
- hypothesis - -tentative interpretation of an observation
- law - -summarizes a large number of observations
- theory - -model that explains and gives underlying causes for observation
- imprecise - -quick and easy like color
- precise - -measuring and proving like numbers
- scientific notation - -1x10^6
- significant figures - -indicates how good or bad a measurement is
- all non zeros are - -significant
- interior zeros - -significant
- trailing zeros before a decimal place - -significant
- trailing zeros after decimal place - -significant
- 16.5400 - -6 sig figs
- 130. - -3 sig figs
- 5003 - -4 sig figs
- exact numbers - -unlimited sig figs
- 3 - -unlimited sig figs
, - multiplication and division - -determined by the number with the fewest
significant figures
- addition and subtraction - -determined by decimal place
- tera - -T 10^12
- giga - -G 10^9
- mega - -M 10^6
- kilo - -k 10^3
- centi - -c 10^-2
- mili - -m 10^-3
- micro - -u 10^-6
- nano - -n 10^-9
- pico - -p 10^-12
- femto - -f 10^-15
- how many pounds does a person who weighs 14.8 stone weight
stone = 14 lbs - -207 lbs
- convert 3.0 cm2 to mm2 - -300 mm2
- density - -mass/volume
- if 5.32g of ethanol takes up 6.74ml of volume, what is the density in g/ml -
-0.789 g/ml
- matter - -Anything that has mass and takes up space
- can you undo a physical change - -yes
- can you undo a chemical change - -yes but it is very very difficult
- energy - -the capacity to do work
cal
joule
kilowatt kwh
127 Questions and Answers
chemistry - -the science that tries to understand how matter behaves by
studying how atoms and molecules behave
- scientific method - -ways of learning that emphasizes observation and
experimentation (self correcting)
- observation - -we go out in nature and ask questions we measure or
observe some aspect of nature
- hypothesis - -tentative interpretation of an observation
- law - -summarizes a large number of observations
- theory - -model that explains and gives underlying causes for observation
- imprecise - -quick and easy like color
- precise - -measuring and proving like numbers
- scientific notation - -1x10^6
- significant figures - -indicates how good or bad a measurement is
- all non zeros are - -significant
- interior zeros - -significant
- trailing zeros before a decimal place - -significant
- trailing zeros after decimal place - -significant
- 16.5400 - -6 sig figs
- 130. - -3 sig figs
- 5003 - -4 sig figs
- exact numbers - -unlimited sig figs
- 3 - -unlimited sig figs
, - multiplication and division - -determined by the number with the fewest
significant figures
- addition and subtraction - -determined by decimal place
- tera - -T 10^12
- giga - -G 10^9
- mega - -M 10^6
- kilo - -k 10^3
- centi - -c 10^-2
- mili - -m 10^-3
- micro - -u 10^-6
- nano - -n 10^-9
- pico - -p 10^-12
- femto - -f 10^-15
- how many pounds does a person who weighs 14.8 stone weight
stone = 14 lbs - -207 lbs
- convert 3.0 cm2 to mm2 - -300 mm2
- density - -mass/volume
- if 5.32g of ethanol takes up 6.74ml of volume, what is the density in g/ml -
-0.789 g/ml
- matter - -Anything that has mass and takes up space
- can you undo a physical change - -yes
- can you undo a chemical change - -yes but it is very very difficult
- energy - -the capacity to do work
cal
joule
kilowatt kwh
