Download - 5`d*

Name:
Midterm #f (100 points total)
True or False (3 pt each):
1
The correct symbol for potassium is
2. !
.-/
P.
i
r
,.
_____--,-1- _r _, 1r r:
,1
, a
Sodium is an example of an alkaline- earth metal
3. !__tcation
4. f-ffr.
t.,_..,-.,.
,\,;:-
l,.i-./_;._ i.
is formed when an atom gains electrons.
formula for lead (II) oxide is
PbzO. i i
i,,
Multiple Choice (3 pt each):
5. If atom A has 6 protons and 6 neutrons, and atom B has 7 protons and 6 neutrons then
how are atoms A and B related to one another?
a. Atoms A and B are isotopes
."' bi. Atoms A and B are atoms of different elements
\--c. All of the above are correct
6.
What is the atomic number for helium?
a.
lamu
( o. /
-c.
d.
e.
arTlu
4 amu
4.0026 amu
1.0079 amu
^r JiX
- 5'd*
7. Potassium metal reacts with fluorine gas to form potassium fluoride. Which of the
following statements is correct regarding this chemical reaction? Can pick more than one.
l*
potassium gains one electron
--a-.
q!,, the potassium ion simulates the electron con{iguration of argon
fluoride ion simulates the electron configuration of neon
i"c.
td. ,the
fluorine loses one electron
e. all are incorrect statements
8. Which of the following
a.
e.
Na*
Na2SOa
(z (g 4 A<f
6
represents a polyatomic cation?
b.
NOz-
,'"\-.c.'NFI4*
.'
d.
F-
Short Answer: Remember to report answers to the correct number of sig figs when
applicable.
9. Identifu
A.
each as-a 1) physical change or 2) chemical change.
Burning a candle.
{I
lce melting on the street.
n
Toasting amarshmallow.
B.
point each)
6I
C.
D.
(l
I
T
cuttrng apizza.
Polishing a silver bowl
E.
10. Write the symbol for the isotope of fluorine that has a mass number
of 19.
(6 pts)
tq
.6 '-,1
ILT
Diethyl ether was the first substance ever used for anesthesia back in the 1840's. It
has a boiling point of 34.6'C. What is diethyl ether's boiling point in Kelvin? (6 pts)
11.
i5 4
Llt
VL.(
22c)7- g
,8 =--lF-=:-''
gf+t
12. How many protons, neutrons and electrons are
f_
(6 pts)
^zt
i-9
V=t
'h
71 *r3
.ttV
/
= //1
13. A student frndJthat ZpittY"A*metal has a mass of 45.22g. The metal displaces
water from a volume of 24.0 mL to 33.0 mL. What is the density of this metal? (8
Pts)
.- 1z1i t, : 'af-u-l
,-z-.?
'?'1
,)
t/
t
14. The density
/ 5.
*-*-7r
'z z
9
'1 C *t-
tu L
f. e
---%+
,J/nr1
t_.
of gold is 19.3glcm3. Convert this to g/ml- (6 points)
/ ?,e
0/^t*
14. Write the electron configuration of 32S. (4 pts)
zrtp g
i
tuE-() =r(,L
r
L
15. What is the mass in grams of 12 nitrogen atoms with a mass of 14.01 amu each?
HINT: 1 amu:1.660539 x10-24 g. SHOWWORKWITHDIMENSIONAL
ANALYSIS! (8 pts)
tL{
1,1
( eG v (o -- "Ltl q5-A,
Cf I
'i z 16Vrrc3
L
16. Rearrange the density equation to solve for volume. (3 pts)
t{1
r!
t/
;
t
,'k lL
d,db.o
11. Provide the name for the following (2 pt each):
a. HzSO+
(aq) - 'a ' {z-r . c
,',-
L
Sr2* .94Yan*rv\{i.:.rr
*$5" Jb.c. CaCO: Cat f ivorr f'v b
a.
sol-
:"\{A&
'
(Je.Fe
f.
a
V
I<-
(OH)3 )
s2- i
u,
l{
619
r, a,l-4+r. NH+*_ 4{4Aa1o
^,.
i
wr
,r,,.u r M
r,.
12. Provide the formula for the following Q pt each):
sodiumphosphate
tJ
a,
b.
calcium iodide C* J
c.
oitri"acid il N'J't
d.
hydroxideion n * -
a.
-P"l
,f
".
iron(III) oxide
{e2o=
f. hydrobromic acid F\ fd
Lab Quiz #1
True or False:
v
(ptr
l. /-Vorare
Z.
f
Name:
each)
allowed to remove your goggles while cleaning up after an experiment.
pxcess chemicals should be returned to the container from which they were originally taken.
Short Answer:
3. A pure substance contains carbon and oxygen. This pure substance must be classified
F
a)element
4. What common
5.
as a(n)
(2 pts)
c) element and
b) compound
eggnt will
=-
compound
d)
mixture
e) none of the above
(2 pts)
today? tl
looh'/!1 {r^r Ctorl-.1- ,q* co nso r nt ,14,tr, fja,
we use to make the compound Alum
Report the volume in the beaker belo'ii'to the correct number of significant figures. Assfme ihat'
increments are given in milliliters. (4 pts)
+1
ML
4
+
Tg*u
t^,n\k 9
6ton'
ru
|
(or+
hai- Ysn. nvl\W
t )uSf coqn of hr"L
t'S
>2 1V tg