Answer:
3.37 m
Explanation:
<u>Number of moles of solute present in 1 kg of solvent is termed as molality</u>
It is represented by 'm'.
Thus,
![Molality\ (m)=\frac {Moles\ of\ the\ solute}{Mass\ of\ the\ solvent\ (kg)}](https://tex.z-dn.net/?f=Molality%5C%20%28m%29%3D%5Cfrac%20%7BMoles%5C%20of%5C%20the%5C%20solute%7D%7BMass%5C%20of%5C%20the%5C%20solvent%5C%20%28kg%29%7D)
Given that:
The mass of LiCl = 15.0 g
Molar mass of LiCl = 42.394 g/mol
The formula for the calculation of moles is shown below:
Thus,
Mass of the solvent = 105 g
Also, 1 g = 0.001 g
So,
Mass of water (solvent) = 0.105 kg
Molality is:
![Molality\ (m)=\frac {0.3538}{0.105}\ m](https://tex.z-dn.net/?f=Molality%5C%20%28m%29%3D%5Cfrac%20%7B0.3538%7D%7B0.105%7D%5C%20m)
<u>Molality = 3.37 m</u>
Answer:
Lead
Explanation:
As you move down the periodic table, the elements get larger and gain additional electron shells, increasing the radius. In order, they are on the table as Chlorine, Selenium, Lead.