CHEM 1211 Test -1 Questions With Correct Answers

CHEM 1211 Test #1 Questions With
Correct Answers
Chemistry |- |CORRECT |ANSWER✔✔-Study |of |matter, |its |transformations, |and |how |it |behaves



Matter |- |CORRECT |ANSWER✔✔-Any |physical |substance |that |occupies |space |and |has |mass. |
Consists |of |molecules |and |atoms, |and |at |the |atomic |and |molecular |level |that |chemical |
transformations |take |place



Macroscopic |Scale |- |CORRECT |ANSWER✔✔-Used |to |determine |matter |seen |with |the |naked |
eye; |where |observations |take |place



Atomic |Scale |(or |molecular |scale) |- |CORRECT |ANSWER✔✔-Is |used |when |describing |individual |
atoms |or |molecules; |describe |and |explain |chemical |processes |here



Order |of |Magnitude |- |CORRECT |ANSWER✔✔-Determined |by |size, |each |class |being |a |number |
of |times |(usually |ten) |greater |or |smaller |than |the |one |before.



Element |- |CORRECT |ANSWER✔✔-Simplest |type |of |matter |and |is |a |pure |substance |that |
CANNOT |be |broken |down |or |separated |into |simpler |substance. |Characterized |by |the |number |
and |types |of |particles |of |which |they |are |composed.



Atoms |- |CORRECT |ANSWER✔✔-Smallest |indivisible |unit |of |an |element. |Consist |of |3 |subatomic
|particles. |Protons, |Neutrons, |Electrons.




Chemical |Compounds |- |CORRECT |ANSWER✔✔-Two |or |more |elements |are |combined |in |a |
defined |ration, |but |they |can |be |broken |down

,Molecules |- |CORRECT |ANSWER✔✔-Collections |of |atoms |that |are |held |together |by |chemical |
bonds



Pure |Substance |- |CORRECT |ANSWER✔✔-Contains |only |one |type |of |element |or |compound |and
|has |a |fixed |chemical |composition




Physical |Properties |- |CORRECT |ANSWER✔✔-Do |NOT |change |chemical |composition |of |the |
material |when |measured



Solid |- |CORRECT |ANSWER✔✔-At |the |macroscopic |level, |it |is |a |dense |material |with |a |defined |
shape. |At |the |atomic |level, |atoms |or |molecules |are |closely |packed |together |vibrating |rapidly, |
but |not |moving |past |one |another.



Liquid |- |CORRECT |ANSWER✔✔-Flows |and |takes |shape |of |the |container. |Atoms |and |molecules |
are |closely |together |and |the |vibrations |allow |them |to |move |past |one |another



Gas |- |CORRECT |ANSWER✔✔-No |fixed |shape |or |volume. |Cannot |be |seen |with |the |naked |eye, |
but |at |the |atomic |level |can |be |seen |with |the |naked |eye. |Space |widely |apart, |rapidly |moving |
apart, |and |do |not |act |strongly |with |each |other



Melting |Point |- |CORRECT |ANSWER✔✔-The |temperature |at |which |a |solid |converts |into |a |liquid



Freezing |Point |- |CORRECT |ANSWER✔✔-Occurs |at |the |same |temperature |as |the |melting |point |
as |energy |is |removed |(temperature |falls)



Boiling |Point |- |CORRECT |ANSWER✔✔-The |temperature |at |which |a |liquid |converts |into |gas



Mixture |- |CORRECT |ANSWER✔✔-A |substance |made |up |of |two |or |more |elements |or |
compounds |that |have |not |reacted |chemically

, Homogeneous |Mixtures |(Solutions) |- |CORRECT |ANSWER✔✔-Mixtures |that |have |a |constant |
composition |throughout |the |material



Heterogenous |Mixtures |- |CORRECT |ANSWER✔✔-Mixtures |in |which |composition |is |not |uniform



Meter |--> |Picometer |- |CORRECT |ANSWER✔✔-1 |meter |= |10^12 |pm



Meter |--> |Nanometer |- |CORRECT |ANSWER✔✔-1 |meter |= |10^9 |nm



Meter |--> |Micrometer |- |CORRECT |ANSWER✔✔-1 |meter |= |10^6 |micrometers



Fahrenheit |Temperature |- |CORRECT |ANSWER✔✔-Freezing |point |of |water |is |set |at |32 |F |and |
boiling |point |is |212 |F



Celsius |Temperature |- |CORRECT |ANSWER✔✔-Freezing |point |of |water |is |0 |C |and |boiling |point |
is |100 |C



Kelvin |Temperature |- |CORRECT |ANSWER✔✔-0 |K |is |273.15 |degrees |lowers |than |0 |C



Absolute |Zero |- |CORRECT |ANSWER✔✔-Lowest |temperature |possible, |which |is |0 |K/-273.15 |C



1 |cubic |centimeters |= |_____ |mL |- |CORRECT |ANSWER✔✔-1 |mL



Density |Forumla |- |CORRECT |ANSWER✔✔-Density |= |(mass/volume)