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e-lub [12.9K]
3 years ago
13

Which of the following contains the most atoms?

Chemistry
1 answer:
liberstina [14]3 years ago
6 0

Answer:

D) 21.62 B

Explanation:

I took a quiz and it says that D is correct. Sorry I couldn't be of more assistance.

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28.What is the correct IUPAC name for the following compound?A)12-crown-5B)12-crown-4C)4-crown-12D)12-crown-12E)Cyclododecane te
mariarad [96]

Answer:

12-crown-4

Explanation:

We must recall that any structural moiety in organic chemistry having the R-O-R unit is an ether. If the oxygen form a ring in which they are sandwiched in between carbon atoms, the compound is known as a crown ether. The name emanates from the close resemblance of the compound to an actual crown.

If we want to name the crown ether, we first count the number of carbon atoms present and the number of oxygen atoms present. The correct name is now, total number of carbon + oxygen atoms -crown- number of oxygen atoms, in this case; 12-crown-4, hence the answer.

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3 years ago
Please help due in 5 min. I need this to be done or my grade will drop from a 96 to a 32.
ratelena [41]

Answer:

E = 3.035× 10-¹⁹J = 1.9eV

f = 4.58 × 10¹⁴Hz

Explanation:

wavelength = 6.55 × 10-⁷m

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E = ?

a) f = c/wavelength

f = 3 × 10⁸/6.55 × 10-⁷

f = 4.58 × 10¹⁴Hz

b) E = hc/wavelength

E = 6.626×10-³⁴ × 3 × 10⁸/ 6.55 × 10-⁷

E = 3.035 × 10-¹⁹J

1ev = 1.6 × 10-¹⁹J

Therefore E = 3.035/1.6 = 1.9eV

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3 years ago
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If an atom has nine protons, eight neutrons and ten electrons what is its charge?
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 THE CHARGE IS NEGATIVE BECAUSE THE  NUMBER OF ELECTRON IS MORE THAN THE NUMBER OF PROTON
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