Answer:
Because the model makes the concepts easier to understand
Explanation:
Models are created to give a visual of every aspect of an experiment. This allows for a better understanding across the board for everyone.
37 grams of NaCl (when I mean equivalent I mean the ratio of the equation is 1:2 for moles or Cl2 and NaCl
74 is the answer u find it by subtracting the protons(atomic number) from atomic mas, so basically... 127-53 =74 neutrons
Explanation:
To determine the charge on a given transition metal atom, you have to consider what element it is, the charges on the other atoms in the molecule, and the net charge on the molecule itself. The charges are always whole numbers, and the sum of all the atomic charges equals the charge on the molecule
Answer : The dissociation constant (Ka) = 9.025 × 
Solution : Given,
Concentration HF solution = 0.100 M
% Dissociation = 9.5 %
The equation for dissociation of HF is :
The Ka expression for HF is :
![Ka=\frac{[H^{+}][F^{-}]}{[HF]}](https://tex.z-dn.net/?f=Ka%3D%5Cfrac%7B%5BH%5E%7B%2B%7D%5D%5BF%5E%7B-%7D%5D%7D%7B%5BHF%5D%7D)
............. (1)
Step 1 : we find the ![[H^{+}]](https://tex.z-dn.net/?f=%5BH%5E%7B%2B%7D%5D)
by using the concentration and % dissociation.
= Concentration HF solution × % Dissociation
= 0.100 M × 
= 9.5 × 
M
Step 2 : For ![[F^{-}]](https://tex.z-dn.net/?f=%5BF%5E%7B-%7D%5D)
, the concentration of is equal to the . From the above equation the stoichiometry of and is 1:1.
Therefore,
= = 0.100 M × = = 9.5 × M
Now, put all the values in equation (1), we get
= 9.025 ×
