The correct answer is:
<span>37/20Ca --> 37/19K + 0/+1e
Explanation:
</span>Transmutation, conversion of 1 element<span> into another. A transmutation entails an </span>amendment within the<span> structure of atomic nuclei and </span>thus is also <span>induced </span><span>by an </span>action<span> (q.v.), </span>like nucleon<span> capture, or occur </span>ad libitum<span> by </span>decay<span>, </span>like disintegration<span> and </span>disintegration<span>(qq.v.)</span>
Answer:NH
+
4
:
0.272
M
SO
2
−
4
:
0.136
M
Explanation:
We can solve this problem using some molarity calculations:
molarity
=
mol solute
L soln
We should convert the given mass of
(NH
4
)
2
SO
4
to moles using its molar mass (calculated to be
132.14
g/mol
):
10.8
g (NH
4
)
2
SO
4
⎛
⎝
1
l
mol (NH
4
)
2
SO
4
132.14
g (NH
4
)
2
SO
4
⎞
⎠
=
0.0817
mol (NH
4
)
2
SO
4
This is the quantity present in
100
mL soln
, so let's calculate the molarity of the solution (converting volume to liters):
molarity
=
0.0817
l
mol (NH
4
)
2
SO
4
0.100
l
L soln
=
0.817
M
10
mL
of this solution is added to
50
mL H
2
O
, which makes a
60
-
mL
total solution.
We can now use the dilution equation
M
1
V
1
=
M
2
V
2
to find the molality of the new,
60
-
mL
solution:
(
0.0817
M
)
(
10
l
mL
)
=
(
M
2
)
(
60
l
mL
)
M
2
=
(
0.817
M
)
(
10
mL
)
60
mL
=
0.136
M
This means that there are
0.136
moles of
(NH
4
)
2
SO
4
per liter of solution.
Let's recognize that
1
mol (NH
4
)
2
SO
4
contains
2
mol NH
+
4
1
mol SO
2
−
4
The concentrations of each ion is thus
(
2
)
(
0.136
M
)
=
0.272
M
NH
+
4
(
1
)
(
0.136
M
)
=
0.136
M
SO
2
−
4
Explanation:
Answer:
chemical change
Explanation:
In chemical change , considerable amount of heat is used , hence a change in substance formed
In the endpoint when the indicator changes color it gives the information that the acid is neutralized by the base.
<h3>What is Titration ? </h3>
Titration is also known as titrimetry is a technique where a solution of known concentration is used to calculate the concentration of the unknown solution. Titration is a laboratory technique.
<h3 /><h3>What is Endpoint ? </h3>
The point at which the indicator changes the color is known as Endpoint.
Thus from the above conclusion we can say that In the endpoint when the indicator changes color it gives the information that the acid is neutralized by the base.
Learn more about the Titration here: brainly.com/question/186765
#SPJ1
<u>Full question:</u>
When energy is changed from one form to another, some of the energy is lost to the surroundings as waste thermal energy. The more steps needed to arrive at the desired energy or the more types of energy that are generated, the more energy is wasted.
Which object would likely have the least amount of wasted energy?
A) an electric drill
B) a solar cell
C) a car engine
D) a hydroelectric dam
Solar cell
<u>Explanation:</u>
In an electric drill, the conversion of electrical energy into mechanical energy takes place. Heat energy is obtained when the desired object gets broken with the drill.
In car engine, thermal energy is obtained from the chemical energy which in turn is converted into mechanical energy which is very essential for moving car.
In hydroelectric dam, energy is obtained from water that is stored in dam. The potential energy of water is transformed into mechanical energy which in turn is converted into kinetic energy which again is transformed into an electrical energy.
In the above methods the transformation of energy takes many steps wherein more amount of energy gets wasted.
In Solar cell, the energy that is obtained from the sun is directly converted into electrical energy. Hence, in solar cell, only less amount of energy will be wasted.
