Answer:
OPTION C) All hydrogen ions and all hydroxide ions have reacted to produce water, and so neither ion remains free in solution.
Explanation:
The PH reading on the left axis of the graph shows a value of 7.
A value of 7 on the PH scale implies that equal number of hydrogen ions completely reacted with hydroxyl ions to produce water i.e there is no excess of hydrogen and hydroxyl ion remaining in solution.
For values greater than 7, a basic solution is formed and it signifies the presence of excess hydroxyl ion. If the value is less than 7, there is more hydrogen ions in the solution formed and it is said to be acidic.
At point 7, the hydrogen and hydroxyl ions are equal and completely neutralize out one another.
Note: The acid solution would require a base volume of 20mL to be completely neutralized according to the plot. If it is less, the PH shifts to the left and the solution becomes acidic. If it more, the solution becomes basic and the PH shifts rightwards.
Answer:
3 molecules
Explanation: i got it right on the test, also because the 2 other ones are compounds because they have hyrdogen and oxygen attached and molecules just have particles of one element attached
Electronic configuration is given by
- 1s orbital is filled
- 2s orbital is unfilled
So
The question is asking to calculate the mass in grams of the acetone that has a volume of 28.74 ml. Base on that, the possible answer would be 22.58 grams. I hope you are satisfied with my answer and feel free to ask for more if you have questions and further clarifications
0.019moles
Explanation:
Given parameters:
Mass of Fe₂O₃ = 1.5g
Unknown:
Number of moles of Fe produced = ?
Solution:
To solve this problem, we must work from the known to the unknown. The known specie here is the mass of Fe₂O₃.
First inspect the equation and balance it;
2Fe₂O₃ + 3C → 4Fe + 3CO₂
Now find the number of moles of Fe₂O₃
Number of moles of Fe₂O₃ = 
molar mass of Fe₂O₃ = 2(56) + 3(16) = 112 + 48 = 160g/mol
Number of moles = 
= 0.009375moles
From the equation, we see that;
2 moles of Fe₂O₃ produced 4 moles of Fe
0.009375 moles of Fe₂O₃ will produce 
= 0.01875moles of Fe
To 2 decimal places;
0.019moles
learn more:
Number of moles brainly.com/question/1841136
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