Answer:
Hydrogen atoms are fused into deuterium, then helium-3, then helium-4, each step giving off large amounts of energy.
Explanation:
<em>Nuclear fusion</em> refers to the process in which <u>two lighter nuclei combine together to form one heavier nucleus</u>. In the Sun, hydrogen atoms combine and form helium. This process releases large amounts of energy because the helium atom has less energy than the hydrogen atoms.
The control is necessary to make sure that you can tell the difference between the regular, non changed experiment, and the change that happens.
Basically, the control helps you to measure, or observe, the difference in experiments.
And example would be using pills, or flavor water, to see how it affects people.
The control would be the group that either doesn't receive pills or water. This is basically to see how it is normally. The norm.
Answer: The concentration of KOH for the final solution is 0.275 M
Explanation:
Molarity of a solution is defined as the number of moles of solute dissolved per Liter of the solution.
![Molarity=\frac{n\times 1000}{V_s}](https://tex.z-dn.net/?f=Molarity%3D%5Cfrac%7Bn%5Ctimes%201000%7D%7BV_s%7D)
where,
n = moles of solute
= volume of solution in ml = 150 ml
moles of solute =![\frac{\text {given mass}}{\text {molar mass}}=\frac{10.0g}{56g/mol}=0.178moles](https://tex.z-dn.net/?f=%5Cfrac%7B%5Ctext%20%7Bgiven%20mass%7D%7D%7B%5Ctext%20%7Bmolar%20mass%7D%7D%3D%5Cfrac%7B10.0g%7D%7B56g%2Fmol%7D%3D0.178moles)
Now put all the given values in the formula of molality, we get
![Molality=\frac{0.178\times 1000}{150}=1.19M](https://tex.z-dn.net/?f=Molality%3D%5Cfrac%7B0.178%5Ctimes%201000%7D%7B150%7D%3D1.19M)
According to the dilution law,
![C_1V_1=C_2V_2](https://tex.z-dn.net/?f=C_1V_1%3DC_2V_2)
where,
= molarity of stock solution = 1.19 M
= volume of stock solution = 15.0 ml
= molarity of diluted solution = ?
= volume of diluted solution = 65.0 ml
Putting in the values we get:
![1.19\times 15.0=M_2\times 65.0](https://tex.z-dn.net/?f=1.19%5Ctimes%2015.0%3DM_2%5Ctimes%2065.0)
![M_1=0.275M](https://tex.z-dn.net/?f=M_1%3D0.275M)
Therefore, the concentration of KOH for the final solution is 0.275 M
Answer:
10
Explanation:
The unbalanced combustion reaction is shown below as:-
On the left hand side,
There are 3 hydrogen atoms and 1 nitrogen atom and 2 oxygen atoms
On the right hand side,
There are 1 nitrogen atom and 2 hydrogen atoms and 2 oxygen atoms
Thus,
Right side,
must be multiplied by 6 to balance hydrogen.
Left side,
must be multiplied by 4 to balance hydrogen.
Also, Right side,
is multiplied by 4 so to balance nitrogen.
Left side,
must be multiplied by 5 to balance the whole reaction.
Thus, the balanced reaction is:-
Sum of Coefficient of product - 4 + 6 = 10