Answer:
a) 2.01 g
Explanation:
- Na₂CO₃ (s) + 2AgNO₃ (aq) → Ag₂CO₃ (s) + 2NaNO₃
First we <u>convert 0.0302 mol AgNO₃ to Na₂CO₃ moles</u>, in order to <em>calculate how many Na₂CO₃ moles reacted</em>:
- 0.0302 mol AgNO₃ *
= 0.0151 mol Na₂CO₃
So the remaining Na₂CO₃ moles are:
- 0.0340 - 0.0151 = 0.0189 moles Na₂CO₃
Finally we <u>convert Na₂CO₃ moles into grams</u>, using its <em>molar mass</em>:
- 0.0189 moles Na₂CO₃ * 106 g/mol = 2.003 g Na₂CO₃
The closest answer is option a).
Answer:
C) The compound is largely ionic with A as the cation.
Explanation:
Pulings proposed the method to determine if the compound is ionic in nature or covalent in nature , by finding the difference between the electronegativity of the respective cation and anion .
The ion with higher electronegativity is the anion and the ion with lower electronegativity is the cation.
The electronegativity difference above 1.7 make the compound ionic in nature.
Hence, from the question ,
A is the cation and B is the anion.
And the electronegativity difference above 1.7 so the compound is ionic in nature.
Convert 72g of water into moles of water using molecular weights.
So water is H2O so add up those molecular weights (H=1 and O=16)
2(1)+(16) = 18 g/mol
Then convert so 72g / (18 g/mol) = 4 mol
Now you can convert mol of water to mol of oxygen. So 4 mol of water is 4 mol of oxygen. Then use oxygen molecular weight to find grams again.
4 mol oxygen * 16 g/mol = 64g of oxygen
If we were doing hydrogen instead of oxygen there would be 8 mol hydrogen in 4 mol of water (2 H’s in every H2O molecule) and since we have 74 grams and oxygen is 64 grams, Hydrogen should be 8 grams. Math to check below
8 mol hydrogen * 1 g/mol = 8g of hydrogen
It all adds to 72 so we are correct.
Answer:
Sliver
Explanation:
Silver has the highest electrical conductivity of all metals. :)
The estimation of the acidic and the basic character of a solution is called and defined by the pH. The ![\rm [H^{+}]](https://tex.z-dn.net/?f=%5Crm%20%5BH%5E%7B%2B%7D%5D)
concentration of the solution will be 
<h3>What is the pH?</h3>
pH is a measurement of the free hydrogen and hydroxyl ions in the solution of the substance.
It can be calculated as:
![\rm pH = - \rm log[H^{+}]](https://tex.z-dn.net/?f=%5Crm%20pH%20%20%3D%20-%20%5Crm%20log%5BH%5E%7B%2B%7D%5D)
Given,
pH = 3.75
Substituting values in the equation:
![\begin{aligned}\rm 3.75 &= -\rm log[H^{+}]\\\\\rm [H^{+}] &= 10^{-3.75}\\\\&= 1.7782 \times 10^{-4}\end{aligned}](https://tex.z-dn.net/?f=%5Cbegin%7Baligned%7D%5Crm%203.75%20%26%3D%20-%5Crm%20log%5BH%5E%7B%2B%7D%5D%5C%5C%5C%5C%5Crm%20%5BH%5E%7B%2B%7D%5D%20%26%3D%2010%5E%7B-3.75%7D%5C%5C%5C%5C%26%3D%201.7782%20%5Ctimes%2010%5E%7B-4%7D%5Cend%7Baligned%7D)
Therefore, 
is the concentration of the hydrogen ions.
Learn more about pH here:
brainly.com/question/10285267
