lntroductory Chemistry Worksheet Chapter 2
1.
Calculate the density of each of the samples described.
a.
Battery fluid, if 125 mL of the fluid has a mass of 155 g ?
D= LV rt--|
I,SSI/ot1
IZS
yn
[,2+ 3/,-L
L
b. A urine sample, if it has a volume of 5.00 mL and a mass of 5.025 g ?
t/v\
D: T-
s,(LZ[q
.J'-
-
5,oo-[ -
l,Do
5 5/^t
c. A 131,5 g bronze rectangular solid measuring 3.55 cm x2.50 cm x 1.75 cm.
D=_
l3l, s
L=
(r . s s c h^ ) (2, 50 ch^) ( l,?sc n)
V
Temperature Gonversion
Formulas:
+3f
oC=K- 27g"
oF
= "C (915)
oC
=
Cr
J
E,+1 6^=
= (519)fF - 32")
K=oC +273
2. Answer the following questions concerning temperature:
a. The thermometer in the classroom reads
"(=
(
74 oF. What is the temperature in oC and K?
i)(r -32) : (q )0+-3D =r z3"c
ZqsK
b. The thermometer outside reads
t4=Z7z+t3 313lK
40.0 oC. \A/hat is this temperature in K and oF ?
"F= "C( 3) + 3z
l+;t(%>+32=fc+'F
oc=
(€ ) fr= -32)- (€ ) (5 -32)'= 4trz7)* F ls T
oC ?
c, The therrnometer in a freezer reads 5.0 oF. What is this temperature in
d.
The
rn:n3metej in a chemical reaction reads -20.0 o C. What is the temperature in oF ?
f- =
C(3)+ ZZ-?zo)(g+32
: -+"F
Unit Conversion Problems
3.
How many grams are in 10.0 kg ?
lo,b k
lccc)?
I,cclc
4. How many milligrams are in 10.00 kg
lC.oo
5.
+
k7
k7
V
?
I c()o,T
Y
l,Dc x(C
l,ccckT
:
Y
7
l,Coo x{c ^?
How many microliters are in 1.234 mL ?
I ,?-3+ "" L
= /Az#7*L
/boC,ptL
A /rooo
rnL
I
t-
/ccoooo'lv-L
/,c>oo L
LI ,23+,,\L Y /,oCO
",:,
/ C OO. tnL
6. How many kilometers
e5
nrTl
are in 25 nm ?
I
XTX
lc
l-fu= A,5
')
hv1
/ 0- r4
hw
= /a3F frL
X/D
7.
How many liters are in 8.00 cubic decimeters (Omg) ?
8,oo
8.
CrnS
r
IL
/ c!^3
_
8,oc L
How many 50.0 mg tablets of medication are required for a75kg patient if the required
dose of the medication is 3 mg per kg of body weight (3 mg/kg) ?
75 k: -6,4/ ,,ri?/,/ x 1i:1,d'fd(F'4
lfu
J /-blet
x 50,O ft,J rrledr
ttrL
"^1
: tl-.H
-hLlt/s
Some useful conversion relationships:
2.54cm=1in.
946mL=1qt
4549=1lb
9. What is the mass
1 fit = 39.4 in.
1 L = 1.06 qt
1 kg = 2.20 lb
1 tn = 1.09 yd
1 9t = 0.946 L
1 lb = 0.454 kg
in kilograms of a 198 lb man ? How many tablets as described in
problem # 8 would be required for this individual ?
.t
qE
l-b
x g:ft=!,{t
l,c o lb =
9q,
g7,1 ky
,x ??s-^'d,* x / l'lfisl
rnJ ,ned
I k3 b,w,
5, ( +) ,hbL{s
50,b
10. How many centimeters are in one-fourth of an inch ?
l.-.,1 t''l x
-4*
l' cc
I
In
: O ,GZS cr'rt
11. How many liters are in 18 gal ?
IEg+l .- +_#^y_l L_ = Gi,qL
---d-r'/( ffi^ l,oaf
("8 L
F
J
12. How many meters are in 14,1 10 ft ?
lD+4+
Lf rl x.,_-..XffiX
ffi'(\fr=o
t2-
rl\
tft'
\z
I,
13. How many cc's (c*3) are contained in 1 .0 cubic inch
co rn = +Zq1'L{4
1in3;f
\
r?,,iT-r"-,jae)
rn )/ \ {,Ca n'r /
-
=
lL,3E7l
=
tU
cu^3
14' Use density as a conversion factor to answer each of the following problems.
a.
lf the density of ether is 0.714 glmL, what is the volume of 0.500 g
of ether ?
?'
b.
5oo
,"? -_: o,?o o
* x c,J
l,s,?
t+
?
Calculate the volume of 0.899 g of acetone (d= .TgZglmL).
?'P 1?3 x {'9?r t' i I,13
y6L Fs Y,-L
r , 13 5
Q
c.
lf a sample of iron (d = T.BT) has a volume of 1S0 mL
f
d.
5g ^n[-,x
What is the mass
of
ru
I ,OO
200.0
ZcO,C c*r3
yvr L
r
I v^L
).
lcwz
3
?
qozq
=
WL
specific heat = cal{g x "C)
r-hgrl < Lrr -le^^ {ure
475,0 g sample of a metal loses 35.7 cal of heat energy when it cools from 4g.9 oC to
28,9oc. what is the specific heat of the metal ?
35cql
s?.-.idc-hext--@r
b.
tnt-
l,2ox rb a
l,l Ex{o'=
cm3 of titanium (d = 4.Sl g/rnl)
/lo{e .' "C ;s
rFf
, what is its mass?
2
15. Questions related to specific heat
d,.
l, I+
qZ'dq -r
C,*l
* 3 5 .ol
oL
^l
t7
O,O3
4
=
J"C
-
How rnuch heat energy is lost when a 35.5 g sample of copper
oc)]
[s.h. = g.0g20 cal(g x
cools from S0.0 oC to 4S.0 oC.
co.f
=
(s ,c) T
('c)
9zc,)tr'
=
)(Z)
Gns)J
Q,c
b,h
= 16.3 ca'{
c. Apool containing ZxrOB g of water cools from 25.0 oC to
in kilocalories ?
?, ,o'A ,,
17.0 oC. What is the heat toss
8"C
rrv\r',( to6
xr
x
oo0co-fi.r
I,co"C
kr*9
[,ooq
)
l,CO
Cctl
=2x{dkc^(