Answer:
4.283M
Explanation:
Hi!
We are given a certain amount of CoCl2, and we are asked to make a smaller portion of it but with a stronger concentration. Dilution is a process where we use this equation: to find the unknown variable.
Think of it this way:
You put a powdered water flavor enhancer into your bottle. You put 5 drops of it, but it evenly distributes around the bottle so it tastes fine.
Now, you put it in a very small, miniscule cup. You have only a certain amount of water and 5 drops of water, but the flavor is so strong since there is less of the water. This is known as the concentration. Volume is just the water+flavor booster.
Let's convert everything to liters since the volume should be in units of liters.
250mL=0.250L
0.150mL=0.150L
Now, let's plug it in. The first two numbers go in the left side of the equation, and we do not know the concentration of the second so we will substitute a variable.
0.250(2.570)=x(0.150) <em>Isolate X.</em>
4.283=x
x=molarity of the solution
The second question asks how many mL of the first solution would you need....since the relationship of MV should be consistent, it should be all of the solution needed.
Answer:
No.
Explanation:
This is because a solution is a mixture with two substances that have already dissolved in each other and so there is no residue left. Filtration works such that part of the mixture has smaller particles that can pass through the membrane of the filter paper while the bigger particles get stuck onto the paper as residue. A solution has a uniform size particle throughout and thus filtration does not work for purifying a solution.
Lewis Structure of
Oxygen Difluoride is sketched as....
Step 1: Calculate the
total number of valence electrons present in OF₂. This is done by adding all valence electrons of each element. i.e...
Valence e⁻s of Oxygen = 6
Valence e⁻s of Fluorine-1 = 7
Valence e⁻s of Fluorine-2 = 7
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Total Valence e⁻s
20Step 2: Draw central element (O) in center surrounded by fluorine atoms. Now, sketch a single bonds between O and both F atoms. Now, subtract 2 electrons per single bond from total valence electrons.. i.e..
Total Valence e⁻s = 20
2 single bonds (2 × 2) = 4
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16Now, distribute remaining 16 electrons on each element to complete its
octet starting from most electronegative element.
Lewis structure of OF₂ is as follow,
You didn't send a picture. But the activation energy is always the difference between the starting point and the highest point in the graph