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MA_775_DIABLO [31]
3 years ago
6

Melanie has to purchase a book for $200 and the study guide that goes with the book cost $31.5. If the sales tax is 8.25% what w

ill be the amount of sales tax on Melanie's purchase
Chemistry
1 answer:
Ahat [919]3 years ago
7 0
200+31.5=231.5 dollars for book and study guide.

231.5×1.0825 tax=250.59875 cost of book with tax or 250.60
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Question: Draw a valid Lewis structure for the molecule CH3NO in which there are no nonzero formal charges on any of the atoms.
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The mentioned molecule with formula, CH₃NO where no bond is found between N and O can be depicted as formamide is shown in the attachment below.  

The formal charges = Number of valence electrons for the atom (V) - the number of electrons in lone pairs (N) - 1/2 (number of electrons in bond pairs, B)

FC = V - N - B/2

Thus, there is a need to calculate valence electrons, electrons in lone pairs, and the number of electrons in bond pairs for each atom in the mentioned molecule.  

V or valence electrons on C = 4e, on H = 1e, on N = 5e, and on O = 6e.  

N or electrons in lone pairs on C = 0e, on H = 0e, on N = 2e, and on O = 4e.  

B or number of electrons in bond pairs for C = 8e, for H = 2e, for N = 6e, and for O = 4e.  

Thus, the formal charges for each will be,  

C = 4 - 0 - (8/2) = 0

H = 1 - 0 - (2/2) = 0

N = 5 - 2 - (6/2) = 0

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Lewis dot structure for the given molecule is given in the attachment below:


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