What element has an electron configuration of 2-8-8-1:
1 answer:
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Answer:
HI (hydrogen iodide).
Explanation:
Hello,
In this case, since iodine is in group VIIA, it has seven valence electrons at its outer shell, which means that it only needs one bond to attain the octet. Moreover, since hydrogen has just one electron at its outer shell, one hydrogen turns out enough to obey the octet when hydrogen and iodine bond as shown below:
Therefore, the required formula is:
Which is hydrogen iodide.
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Answer: The number of moles of the weak acid in the solution is 0.00396
Explanation:
To calculate the number of moles for given molarity, we use the equation:
a)
The balanced chemical reaction is:
1 mole of base uses = 1 mole of
0.00396 moles of base use = moles of
Thus the number of moles of the weak acid in the solution is 0.00396