CHEM 1205 CH 1 & 2 TEST QUESTIONS
WITH CORRECT ANSWERS
what |are |the |3 |states |of |matter? |- |CORRECT |ANSWER✔✔-solids, |liquids, |and |gases
solids |- |CORRECT |ANSWER✔✔-definite |shape |and |volume, |locked |into |a |rigid |3D |pattern
liquids |- |CORRECT |ANSWER✔✔-definite |volume, |takes |the |shape |of |the |container, |particles |
are |close |together |but |slide |over |each |other
gases |- |CORRECT |ANSWER✔✔-no |definite |shape, |no |definite |volume, |expands |to |fill |the |
volume |and |shape |of |container, |very |far |apart |and |move |around |randomly
physical |properties |- |CORRECT |ANSWER✔✔-can |be |observed |or |measured |without |changing |
the |composition
examples |of |physical |properties |are |- |CORRECT |ANSWER✔✔-melting |point, |boiling |point, |
solubility, |color, |odor
physical |change |- |CORRECT |ANSWER✔✔-alter |the |arrangement |but |not |the |composition |(ex. |
water |to |steam, |water |to |ice, |etc.)
chemical |properties |- |CORRECT |ANSWER✔✔-cannot |be |observed |without |altering |the |
substance |(observed |during |a |chemical |reaction)
, examples |of |chemical |properties |are |- |CORRECT |ANSWER✔✔-flammability, |toxicity, |acidity, |
reactivity |(many |types), |and |heat |of |combustion
chemical |change |- |CORRECT |ANSWER✔✔-converts |one |substance |to |another |(ex. |a |banana |
rotting)
pure |substance |- |CORRECT |ANSWER✔✔-composed |of |only |a |single |component |(atom |or |
molecule), |constant |in |composition, |cannot |be |broken |down |by |a |physical |change
examples |of |a |pure |substance |- |CORRECT |ANSWER✔✔-sugar, |H2O
mixture |- |CORRECT |ANSWER✔✔-are |composed |of |more |than |one |component, |they |can |have |
varying |composition |(any |combo |of |solid, |liquid, |or |gas), |mixtures |can |be |separated |into |
components |by |a |physical |process
examples |of |a |mixture |- |CORRECT |ANSWER✔✔-salt |and |pepper, |oil |and |vinegar, |salt |water
matter |- |CORRECT |ANSWER✔✔-anything |that |has |mass |and |takes |up |space
exact |numbers |- |CORRECT |ANSWER✔✔-counting |or |part |of |a |definition |(ex. |10 |fingers, |
1m=10cm, |2.54cm=1in)
inexact |numbers |- |CORRECT |ANSWER✔✔-a |measurement |or |observation |with |some |
uncertainty |(any |number |obtained |by |measurement)
significant |figures |- |CORRECT |ANSWER✔✔-all |digits |in |a |measured |number |including |ONE |
estimated |digit
T |or |F? |all |NON-zero |numbers |are |significant |- |CORRECT |ANSWER✔✔-T
WITH CORRECT ANSWERS
what |are |the |3 |states |of |matter? |- |CORRECT |ANSWER✔✔-solids, |liquids, |and |gases
solids |- |CORRECT |ANSWER✔✔-definite |shape |and |volume, |locked |into |a |rigid |3D |pattern
liquids |- |CORRECT |ANSWER✔✔-definite |volume, |takes |the |shape |of |the |container, |particles |
are |close |together |but |slide |over |each |other
gases |- |CORRECT |ANSWER✔✔-no |definite |shape, |no |definite |volume, |expands |to |fill |the |
volume |and |shape |of |container, |very |far |apart |and |move |around |randomly
physical |properties |- |CORRECT |ANSWER✔✔-can |be |observed |or |measured |without |changing |
the |composition
examples |of |physical |properties |are |- |CORRECT |ANSWER✔✔-melting |point, |boiling |point, |
solubility, |color, |odor
physical |change |- |CORRECT |ANSWER✔✔-alter |the |arrangement |but |not |the |composition |(ex. |
water |to |steam, |water |to |ice, |etc.)
chemical |properties |- |CORRECT |ANSWER✔✔-cannot |be |observed |without |altering |the |
substance |(observed |during |a |chemical |reaction)
, examples |of |chemical |properties |are |- |CORRECT |ANSWER✔✔-flammability, |toxicity, |acidity, |
reactivity |(many |types), |and |heat |of |combustion
chemical |change |- |CORRECT |ANSWER✔✔-converts |one |substance |to |another |(ex. |a |banana |
rotting)
pure |substance |- |CORRECT |ANSWER✔✔-composed |of |only |a |single |component |(atom |or |
molecule), |constant |in |composition, |cannot |be |broken |down |by |a |physical |change
examples |of |a |pure |substance |- |CORRECT |ANSWER✔✔-sugar, |H2O
mixture |- |CORRECT |ANSWER✔✔-are |composed |of |more |than |one |component, |they |can |have |
varying |composition |(any |combo |of |solid, |liquid, |or |gas), |mixtures |can |be |separated |into |
components |by |a |physical |process
examples |of |a |mixture |- |CORRECT |ANSWER✔✔-salt |and |pepper, |oil |and |vinegar, |salt |water
matter |- |CORRECT |ANSWER✔✔-anything |that |has |mass |and |takes |up |space
exact |numbers |- |CORRECT |ANSWER✔✔-counting |or |part |of |a |definition |(ex. |10 |fingers, |
1m=10cm, |2.54cm=1in)
inexact |numbers |- |CORRECT |ANSWER✔✔-a |measurement |or |observation |with |some |
uncertainty |(any |number |obtained |by |measurement)
significant |figures |- |CORRECT |ANSWER✔✔-all |digits |in |a |measured |number |including |ONE |
estimated |digit
T |or |F? |all |NON-zero |numbers |are |significant |- |CORRECT |ANSWER✔✔-T
