The answer is B.) Some plates move toward each other, while others move away from or alongside each other.
To determine the Ka of the acid, we can use the equation for the pH of weak acids which is expressed as:
pH = -0.5 log Ka
2.67 = -0.5 log Ka
Ka = 4.571x10^-6
Weak acids are acids that do not dissociate completely in solution. The solution would contain the cations, anions and the acid itself as a compound. Hope this helps.
Answer:
Explanation:
We have to start with the <u>reaction</u>:
![MgCO_3~->~MgO~+~CO_2](https://tex.z-dn.net/?f=MgCO_3~-%3E~MgO~%2B~CO_2)
We have the same amount of atoms on both sides, so, we can continue. The next step is to find the <u>number of moles</u> that we have in the 110.0 g of carbon dioxide, to this, we have to know the <u>atomic mass of each atom</u>:
C: 12 g/mol
O: 16 g/mol
Mg: 23.3 g/mol
If we take into account the number of atoms in the formula, we can calculate the <u>molar mass</u> of carbon dioxide:
In other words:
. With this in mind, we can calculate the moles:
![110~g~CO_2\frac{1~mol~CO_2}{44~g~CO_2}=25~mol~CO_2](https://tex.z-dn.net/?f=110~g~CO_2%5Cfrac%7B1~mol~CO_2%7D%7B44~g~CO_2%7D%3D25~mol~CO_2)
Now, the <u>molar ratio</u> between carbon dioxide and magnesium carbonate is 1:1, so:
![2.5~mol~CO_2=2.5~mol~MgCO_3](https://tex.z-dn.net/?f=2.5~mol~CO_2%3D2.5~mol~MgCO_3)
With the molar mass of
(
. With this in mind, we can calculate the <u>grams of magnesium carbonate</u>:
I hope it helps!