Answer:
just by making or answering the questions
D. layer B is younger than layer G.
Answer:
The molar concentration of the final solution is 1.71 ![\frac{moles}{liter}](https://tex.z-dn.net/?f=%5Cfrac%7Bmoles%7D%7Bliter%7D)
Explanation:
Molarity is a way of expressing the concentration of solutions and indicates the number of moles of solute dissolved per liter of solution.
The molarity of a solution is calculated by dividing the moles of the solute by the volume of the solution.:
![Molarity (M)=\frac{number of moles of solute}{volume}](https://tex.z-dn.net/?f=Molarity%20%28M%29%3D%5Cfrac%7Bnumber%20of%20moles%20of%20solute%7D%7Bvolume%7D)
Molarity is expressed in units (
).
Then, the number of moles of solute can be calculated as:
number of moles of solute= molarity* volume
So, in this case, the final concentration can be calculated as:
![Final molarity (M)=\frac{Total number of moles of solute}{Total volume}](https://tex.z-dn.net/?f=Final%20molarity%20%28M%29%3D%5Cfrac%7BTotal%20number%20of%20moles%20of%20solute%7D%7BTotal%20volume%7D)
where, being 65 mL=0.065 L, 125 mL=0.125 L and 190 mL=0.190 L (because 1000 mL= 1 L):
- Total number of moles of solute= 0.065 L*0.513
+ 0.125 L*2.33
= 0.033345 moles + 0.29125 moles= 0.324595 moles - Total volume= 65 mL + 125 mL= 190 mL= 0.190 L
Replacing:
![Final molarity (M)=\frac{0.324595 moles}{0.190 L}](https://tex.z-dn.net/?f=Final%20molarity%20%28M%29%3D%5Cfrac%7B0.324595%20moles%7D%7B0.190%20L%7D)
Final molarity ≅ 1.71 ![\frac{moles}{liter}](https://tex.z-dn.net/?f=%5Cfrac%7Bmoles%7D%7Bliter%7D)
<u><em>The molar concentration of the final solution is 1.71 </em></u>
<u><em></em></u>
The chemical element that is formed when I-131 undergoes beta-minus decay is Xe.
<h3>What is a beta minus decay?</h3>
A beta minus decay is one in which an electron is changed into a proton. The atomic number of the daughter nucleus will increase by one unit and is one place after the parent in the periodic table.
The chemical element that is formed when I-131 undergoes beta-minus decay is Xe.
Learn more about beta decay:brainly.com/question/25455333
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