Oxygen gains two electrons when it bonds to form a complete outer shell and magnesium loses two electrons when bonding to gain its full outer shell.
As electrons are negative, the oxygen (which gains electrons) will become negative and the magnesium (which loses electrons) will become positive.
The negative and positive ions will then attract to one another due to the magnetic pull of the positive and negative.
Answer : The correct option is, (C) 0.675 M
Explanation :
Using neutralization law,
![M_1V_1=M_2V_2](https://tex.z-dn.net/?f=M_1V_1%3DM_2V_2)
where,
= concentration of
= 13.5 M
= concentration of diluted solution = ?
= volume of
= 25.0 ml = 0.0250 L
conversion used : (1 L = 1000 mL)
= volume of diluted solution = 0.500 L
Now put all the given values in the above law, we get the concentration of the diluted solution.
![13.5M\times 0.0250L=M_2\times 0.500L](https://tex.z-dn.net/?f=13.5M%5Ctimes%200.0250L%3DM_2%5Ctimes%200.500L)
![M_2=0.675M](https://tex.z-dn.net/?f=M_2%3D0.675M)
Therefore, the concentration of the diluted solution is 0.675 M
Percent error can be calculated by the difference of the theoretical value and the measured value divided by the theoretical value multiplied by 100 percent.
% error = 27.26 - 27.2 / 27.26 x100
% error = 0.22%
A value close to zero would mean that the measured value is more or less near the actual value.
Answer:
<h3>The answer is 10 g/mL</h3>
Explanation:
The density of a substance can be found by using the formula
![density = \frac{mass}{volume} \\](https://tex.z-dn.net/?f=density%20%3D%20%20%5Cfrac%7Bmass%7D%7Bvolume%7D%20%5C%5C)
From the question
mass = 300 g
volume = final volume of water - initial volume of water
volume = 40 - 10 = 30 mL
We have
![density = \frac{300}{30} = \frac{30}{3} \\](https://tex.z-dn.net/?f=density%20%3D%20%20%5Cfrac%7B300%7D%7B30%7D%20%20%3D%20%20%20%20%5Cfrac%7B30%7D%7B3%7D%20%20%5C%5C%20)
We have the final answer as
<h3>10 g/mL</h3>
Hope this helps you