Straighterline Chemistry Final Questions & answers

Straighterline
Chemistry
Final
What
is
the
term
used
for
findings
that
are
summarized
based
on
a
pattern
or
trend?
a.
Law
b.
Hypothesis
c.
Theory
d.
Phenomena
e.
Prediction
-
CORRECT
ANSWER-a.
Law
Which
of
the
following
is
a
tentative
explanation
for
a
set
of
observations?
Select
one:
a.
Law
b.
Hypothesis
c.
Theory
d.
Phenomena
e.
Prediction
-
CORRECT
ANSWER-b.
Hypothesis
If
a
liquid
contains
60%
sugar
and
40%
water
throughout
its
composition
then
what
is
it
called?
Select
one:
a.
Solute
b.
Compound
c.
Homogeneous
mixture
d.
Heterogeneous
mixture
e.
Solvent
-
CORRECT
ANSWER-c.
Homogeneous
mixture
Which
of
the
following
does
not
have
a
uniform
composition
throughout?
Select
one:
a.
Element
b.
Compound
c.
Homogeneous
mixture
d.
Heterogeneous
mixture
e.
Solvent
-
CORRECT
ANSWER-d.
Heterogeneous
mixture
Which
one
of
these
represents
a
physical
change? Select
one:
a.
Water,
when
heated,
forms
steam.
b.
Bleach
turns
hair
yellow.
c.
Sugar,
when
heated,
becomes
brown.
d.
Milk
turns
sour.
e.
Apples,
when
exposed
to
air,
turn
brown.
-
CORRECT
ANSWER-a.
Water,
when
heated,
forms
steam.
How
many
micrograms
are
in
65.3
kg?
Select
one:
a.
0.653
μ
g
b.
6.53
×
107
μ
g
c.
6.53
×
104
μ
g
d.
6.53
×
10-8
μ
g
e.
6.53
×
1010
μ
g
-
CORRECT
ANSWER-e.
6.53
×
1010
μ
g
A
smart
phone
has
dimensions
of
4.9
inches
(height),
2.3
inches
(width)
and
8.0
millimeters
(depth).
What
is
the
volume
of
the
smart
phone
in
cubic
centimeters?
(1
in
=
2.54
cm)
Select
one:
a.
58
cm3
b.
1.7
x
105
cm3
c.
90
cm3
d.
3.4
cm3
e.
34
cm3
-
CORRECT
ANSWER-a.
58
cm3
Given
that
1
inch
=
2.54
cm,
1.00
cm3
is
equal
to
Select
one:
a.
16.4
in3
b.
6.45
in3
c.
0.394
in3
d.
0.155
in3
e.
0.0610
in3
-
CORRECT
ANSWER-e.
0.0610
in3
What
terms
defines
a
mass
which
is
exactly
equal
to
1/12
the
mass
of
one
carbon-12
atom? Select
one:
a.
Isotope
number
b.
Mass
number
c.
Mass-to-charge
ratio
d.
Atomic
number
e.
Atomic
mass
unit
-
CORRECT
ANSWER-e.
Atomic
mass
unit
How
many
neutrons
are
there
in
an
atom
of
lead
whose
mass
number
is
208?
Select
one:
a.
82
b.
126
c.
208
d.
290
e.
none
of
them
-
CORRECT
ANSWER-b.
126
Which
of
these
elements
is
chemically
similar
to
magnesium?
Select
one:
a.
Sulfur
b.
Calcium
c.
Iron
d.
Nickel
e.
Potassium
-
CORRECT
ANSWER-b.
Calcium
C(graphite)
and
C(diamond)
are
examples
of:
Select
one:
a.
isotopes
of
carbon.
b.
allotropes
of
carbon.
c.
the
law
of
definite
proportions.
d.
different
carbon
ions.
-
CORRECT
ANSWER-b.
allotropes
of
carbon.
The
80Br-
ion
has
Select
one:
a.
45
protons,
35
neutrons,
45
electrons. b.
35
protons,
45
neutrons,
34
electrons.
c.
35
protons,
45
neutrons,
36
electrons.
d.
45
protons,
35
neutrons,
46
electrons.
e.
35
protons,
45
neutrons,
46
electrons.
-
CORRECT
ANSWER-e.
35
protons,
45
neutrons,
46
electrons.
The
formula
for
sodium
sulfide
is
Select
one:
a.
NaS
b.
K2S
c.
NaS2
d.
Na2S
e.
SeS
-
CORRECT
ANSWER-d.
Na2S
Which
one
of
the
following
formulas
of
ionic
compounds
is
the
least
likely
to
be
correct?
Select
one:
a.
NH4Cl
b.
Ba(OH)2
c.
Na2SO4
d.
Ca2NO3
e.
Cu(CN)2
-
CORRECT
ANSWER-d.
Ca2NO3
What
is
the
name
of
ClO
-
ion?
Select
one:
a.
hypochlorite
b.
chlorate
c.
chlorite
d.
perchlorate
e.
perchlorite
-
CORRECT
ANSWER-a.
hypochlorite
Which
of
the
following
is
a
molecular
formula
for
a
compound
with
an
empirical
formula
of
CH?
Select
one:
a.
C2H6
b.
C3H9
c.
C4H10