Chem 121 UNR final

Chem 121 UNR final Questions And
Answers With Latest Update


Homogenous eMixture e- eAnswer e- emixture esame ethroughout eEX) eAir

Heterogenous eMixture e- eAnswer e- eMixture edifferent ethroughout eEX) eSmoke

Density= e- eAnswer e- eMass(g)/Volume(l)

Filtration e- eAnswer e- eUsed eto esperate ea ehetro emixture

Distillation e- eAnswer e- efrom eHomo eMixture, eUse eboiling epoints

Kilo e- eAnswer e- e1x10^3

Centi e- eAnswer e- e1x10^-2

Mili e- eAnswer e- e1x10^-3

Micro e- eAnswer e- e1x10^-6

Nano e- eAnswer e- e1x10^9

Pico e- eAnswer e- e1x10^-12

Add eor eSubtract e= e- eAnswer e- enumber eof edecimal eplaces

multiply eor edivide e= e- eAnswer e- enumber eof esig efigs

Never ea esig efig e- eAnswer e- e0's eat ethe ebeginning eof ea enumber

0's ebetween e2 esig efig e- eAnswer e- eAre esignificant

all enon ezero e- eAnswer e- eare esignificant

0's eat ethe eend, ewhen edecimal eplace eis epresent e- eAnswer e- eare esignificant

Law eof econservation eof emass e- eAnswer e- ematter ecannot ebe ecreated eor edestroyed

law eof econstant ecomposition e- eAnswer e- erelative eproportions eof emass eare ethe esame

Ernest eRuthford's eExperiment e- eAnswer e- eshot eparticles eat ea erelevance: ediscovered epositively echarged
eparticles, ethe eNucleus



Atomic eNumber e- eAnswer e- eTop enumber eon eElement, eNumber eof eProtons

Number eBelow eElement eSymbol e- eAnswer e- eAtomic eWeight

Isotope e- eAnswer e- esame enumber eof eprotons edifferent enumber eor eneutrons

, Ion e- eAnswer e- esame enumber eof eprotons edifferent enumber eof eelectrons

Group e1 e- eAnswer e- ealkaline emetals

group e2 e- eAnswer e- ealkali eearth emetals

group e16 e- eAnswer e- echalogens

group e17 e- eAnswer e- ehalogens

group e18 e- eAnswer e- enoble egases

groups e3-15 e- eAnswer e- etransfer emetals

Fractional eAbundance e- eAnswer e- e[(atomic eweight)(% edecimal efrom)] e+ e[""]

common eions e- eAnswer e- eNO3-

SO4-

ClO4-

ClO3-

Types eof eNomenclature eCompounds e- eAnswer e- eIonic e(metal/Nonmetal)

Molecular e(nonmetal/nonmetal)

-ite enomenclature e- eAnswer e- ecompound ewith eleast eamount eof eoxygen

-ate enomenclature e- eAnswer e- emost eamount eof eoxygen

mono e- emolecular e- eAnswer e- e1

di e- emolecular e- eAnswer e- e2

tri e- emolecular e- eAnswer e- e3

tetra e-molecular e- eAnswer e- e4

Penta e- emolecular e- eAnswer e- e5

hexa e- emolecular e- eAnswer e- e6

hepta e- emolecular e- eAnswer e- e7

octa e- emolecular e- eAnswer e- e8

nona e- emolecular e- eAnswer e- e9

deca e- emolecular e- eAnswer e- e10

Acid eIonic e- eAnswer e- eide e= ehypo_____ic eacid

acid eBinary e- eAnswer e- eide= eHydro___ic eacid

ite eacid e- eAnswer e- e=____ous eacid