Answer:
4.285 L of water must be added.
Explanation:
Hello there!
In this case, for this dilution-like problems, we need to figure out the final volume of the resulting solution so that we would be able to obtain the correct volume of diluent (water) to be added. In such a way, we can obtain the final volume, V2, as shown below:
Thus, by plugging in the initial molarity, initial volume and final molarity (0.587 M) we obtain:
It means we need to add:
Of diluent water.
Regards!
Answer:
can't be done
Explanation:
protons and electrons always are the same number,and the neutrons are found by subtracting the atomic mass and protons/electrons soooooooo it can't have 15 protons, 18 electrons, and 18 neutrons.......i hope this helped if not please tell me.
Answer:
Carbon
Explanation:
The non metal in the same group as Pb is carbon or C .
I hope this helps you.
Answer:
pH=8.676
Explanation:
Given:
0.75 M 
0.20 M 
The objective is to calculate the pH of the buffer using the kb for 
Formula used:
![pOH=pka+log\frac{[salt]}{[base]}\\](https://tex.z-dn.net/?f=pOH%3Dpka%2Blog%5Cfrac%7B%5Bsalt%5D%7D%7B%5Bbase%5D%7D%5C%5C)
pH=14-pOH
Solution:
On substituting salt=0.75 and base=0.20 in the formula
pH=14-pOH
On substituting the pOH value in the above expression,
pH=14-5.324
Therefore,
pH=8.676
Answer:
13: d
14: d
Explanation:
Filteration is useful when the things you are trying to separate are in different states - i.e an insoluble solid from a liquid.
Homogeneous mixtures are made up of substances in the same state (e.g multiple gases in air), so couldn't easily be separated in filtration.
Solutions have solutes dissolved in them, so they could also not be separated by filtration (e.g salt water or alcohol solution).
Elements are made up of one thing, and depending on the element it would depend on how you separated it. You could have two gases, like hydrogen and helium, which would be hard to separate by filtration!
That leaves heterogeneous mixtures, which are in different states to each other, so this would be an appropriate way to separate them.
Hope this helps! Let me know if you have any questions :)
