Answer:
+ 3
Ex planation:
Al3+ indicates an ion of aluminum having a charge of + 3. I.e., since an aluminum atom normally has 13 protons and 13 electrons, this ion has 10 electrons (-10 charge) and 13 protons (+ 13 charge) giving it a charge of + 3 (-10 + 13 = +3).
hope this helps!
I choose the letter c witch is density I believe that it’s useful for determining identifying relationships between substances
The question is incomplete, here is the complete question:
Calculate the volume in liters of a 0.13 M potassium dichromate solution that contains 200. g of potassium dichromate . Round your answer to 2 significant digits.
<u>Answer:</u> The volume of solution is 5.2 L
<u>Explanation:</u>
To calculate the volume of solution, we use the equation used to calculate the molarity of solution:

We are given:
Molarity of solution = 0.13 M
Given mass of potassium dichromate = 200. g
Molar mass of potassium dichromate = 294.15 g/mol
Putting values in above equation, we get:

Hence, the volume of solution is 5.2 L
The subatomic particle that plays the greatest role in determining the physical and chemical properties of an element is the electron. The electron has <span> symbol </span><span>e− </span><span>or </span><span>β− </span><span>with a negative </span>elementary electric charge<span>. Thank you for posting your question here. I hope the answer helps. </span>