I believe I know the answer to #4
ANSWER: Two moles to a first approximation
*Disclaimer* I'm pretty sure I'm right, but I could be wrong
14,400 gallons of water can be filtered by the new water filter invented by the company.
It is given that the filter can process 10 gallons of water per minute.
So In an hour:
10 gallons per minute x 60 minutes = 600 gallons in 1 hour.
And in a day:
24 hours x 600 gallons per hour = 14,400 gallons in 24 hours.
Hence, 14,400 gallons of water can be filtered.
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Answer:
See the image below
Explanation:
To draw a Lewis structure of a molecule, you place the least electronegative atom (Xe) as the central atom, with the more electronegative atoms (O) surrounding it.
Then you distribute the electrons around the atoms, giving every one an octet and placing any extra electrons on the central atom.
This procedure gives you four possible Lewis structures, so the actual structure is a resonance hybrid of them all.
Structure D has no formal charges, so it is the major contributor.