LMrn L- Whrte
Short Answer Fill in the blank(s) with the best
possible
word,
expression or number.
7. In one or two complete sentences,
explain
the difference
between the terms empirical formula
and
molecular fo nula. (4
poinrs)
1r^- e^q,nlt,"l -{o,^rL[^ 'p Itra (owet+ w\^ole 6111..6",-
zti- .{
t ur),, < \.w,eal )y, 7a ,utv-y,t^n).
-h. !,.o\d,^U^c Qr.-r\.n \s + Q .\.4v-a-! nutr"rLr c,{ zL"b,.=
(eseul vt rn ,'rol"L-\< , fnn 1,rtt.. ".L.n n,J,
8. How many moles
of each
element
are
present
in I mole
of Cur(POJr?
(3
points)
1 rc-le:;
2 uv'-\<
:'
? ,*-lrs
L,.^
9, An aqueous solution of sodium carbonate was mixed with
an aqueous
solution of calcium chloride,
The
precipitate
calcium carbonate was formed. Write
a balanced chemical
eqlntion for this
process.
(6 poinls)
Na,2.('O
j1/
or) *( aLlz ,0,,, +) Na( | 1,r,,,
t(
aCO
e
,r;
10. Classify the following
compounds as strong electrolyte, weak
electrolyte, non-electrolyte or
insoluble.
Write the
formula
of the species
(atom,
ion, or molecule)
that exists in water for each
case. (6
pointr)
Non-electrolyte, or Insoluble cies in Water
P
()
MgC03
C"H,O" rslucose)
tutl tn 9 $)
C.,
t\rz
oc.
(.2)
N^+
cn" , W-{a
Strong-, Weak-, or
i
n< at
tL
[i<
n oia
-
$lrru nA -
NaBr
