Number of moles = mass/ molar mass
= 45.6g / 88.90g/mol
= 0.512 moles
Mass of CaCl2=11g
I hope this one is help you
Answer:
<h2>9.26 L</h2>
Explanation:
The density of a substance can be found by using the formula

From the question we have

We have the final answer as
<h3>9.26 L</h3>
Hope this helps you
Answer:

Explanation:
Considering the Henderson- Hasselbalch equation for the calculation of the pH of the acidic buffer solution as:
![pH=pK_a+log\frac{[salt]}{[acid]}](https://tex.z-dn.net/?f=pH%3DpK_a%2Blog%5Cfrac%7B%5Bsalt%5D%7D%7B%5Bacid%5D%7D)
Given that:-
[Acid] = 0.12 M
Volume = 3.0 L
pKa = 3.74
pH = 5.30
So,
![5.30=3.74+log\frac{[sodium\ formate]}{0.12}](https://tex.z-dn.net/?f=5.30%3D3.74%2Blog%5Cfrac%7B%5Bsodium%5C%20formate%5D%7D%7B0.12%7D)
Solving, we get that:-
[Sodium formate] = 4.36 M
Considering:

So,

So, Moles of sodium formate = 4.36*3.0 moles = 13.08 moles
Molar mass of sodium formate = 68.01 g/mol
The formula for the calculation of moles is shown below:

Thus,

