2 atoms of Al
3 of S
4*3=12 of O
so total= 17
The electron dot structure for each molecule are:
.. ..
a. H:O:O:H
.. ..
The partial negative charges are on the Oxygen atoms.
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b. H:Cl:
..
The partial negative charge is on the Chlorine atom.
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c. H:Br:
..
The partial negative sign is on Bromine atom.
..
d. H:O:H
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The partial negative sign is on the Oxygen atom.
I wanna say false, but I’m sorry if I’m wrong :(
Answer:
0.7692 M ≅ 0.77 M.
Explanation:
- It is known that the no. of millimoles of a solution before dilution is equal to the no. of millimoles of the solution after the dilution.
<em>(MV) before dilution = (MV) after dilution.</em>
M before dilution = 2.0 M, V before dilution = 0.25 L.
M after dilution = ??? M, V after dilution = 0.25 L + 0.40 L = 0.65 L.
∴<em> M after dilution = (MV) before dilution/(V) after dilution</em> = (2.0 M)(0.25 L)/(0.65 L) =<em> 0.7692 M ≅ 0.77 M.</em>
