Each oxygen will have the oxidation number (2-), and we know the total charge is 1-. We have four oxygen atoms per molecule, so we can set up the equation:
(charge on Mn) + 4(charge on O) = -1
(charge on Mn) + 4(-2) = -1
(charge on Mn) - 8 = -1
Charge on Mn = 7
The answer is C. 7
Answer:The new volume will be
0.7 L
Explanation:
This is an example of Charles' law, sometimes called the temperature-volume law. It states that the volume of a gas is directly proportional to the Kelvin temperature, while pressure and amount are held constant.
The equation is
V
1
T
1
=
V
2
T
2
, where
V
is volume and
T
is temperature in Kelvins.
Known
V
1
=
0.5 L
T
1
=
20
∘
C
+
273.15
=
293 K
T
2
=
150
∘
C
+
273.15
=
423 K
Unknown
V
2
Solution
Rearrange the equation to isolate
V
2
. Substitute the known values into the equation and solve.
V
2
=
V
1
T
2
T
1
V
2
=
(
0.5
L
×
423
K
)
293
K
=
0.7 L
rounded to one significant figure
Answer:
135.6
Explanation:
12 * 11.3 = 135.6
To find the mass you have to multiply the density and volume together
If you already have the mass you divide the mass by either the density or volume
Answer:
Explorations include static electricity, magnets, electromagnets and permanent magnets. Examples of cause and effect relationships could include how the distance between objects affects strength of the force and how the orientation of magnets affects the direction of the magnetic force.
Explanation:
