Page 286 - Chemistry eBook

nd polar
nd nonpolar of the nucl
(3) 􏰁
(4) 􏰁
lectrons?
(3) N
(4) Rb
l bond, ener
(3) pr (4) rel
Density
on-dot diagr e ground sta
N
Mole Calc
( 3)
Percent Er
likely electro ent?
(3) 3.
Percent C
(4) 4.
ion has a cha (3) ph
Concentra
(4) thi
us of an oxygen 6
􏰁 􏰁
gy must be
duced eased
20 At standard pressure, which substance becomes less soluble in water as temperature increases from 10.°C to 80.°C?
(1) HCl (3) NaCl
(2)KCl SampleRegent(s4)QNueHstCiolns 4
lations
23 The temperature of a sample of matter is a
measure of the
(1) total kinetic energy of the particles in the
4)
ror
number of moles = gram-formula mass
negativity value
sample
Choice #2
Table T
22 Which type of energy is associated with the
Important Formulas and Equations
random motion of atoms and molecules in a
(2) elecVtr=icavol leunmergy (4) thermal energy
sample of air?
June 2012 #21
m d = density
d= (1)chemi=camlaesnsergy (3)nuclearenergy
am represents a V te?
N
given mass
Answer
measurseadmvaplule – accepted value Expl%anaetrironr:=Well, if you check out good old × 100
(2) toatcaclepotetdenvatliuael energy of the particles in the Reffy, Table G (p. 3), you will see that the
parts per million equation is the grams of solute
(3) average potential energy of the particles in
% composition by tmhaesss=ample × 100 divided by grams of solution and then multiplied by
a million.
rge of 3􏰀? osphate ion
mposition
mass of whole Thanks, Reffy, (4) average kinetic energy of the particles in the
mass of part
parts per million =
mass of solute
× 1000000
mass of solution
tion
sample for your help! 24 Which unit is used to express the pressure of a
ocyanate ion
gas?
moles of solute
(1) mole (3) kelvin
molarity =
21 Which type of concentration is calculated when the grams of solute is divided by the grams of the solution, and the result is multiplied by 1 000 000?
(1) molarity (3) percent by mass (2) parts per million (4) percent by volume
ee
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a
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285 © UNIT 7: SOLUTIONS / SOLUBILITY
liter of solution (2) joule
(4) pascal