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tatuchka [14]
3 years ago
15

Кее 2. How have observations of the natural world helped in the development of calendars?

Chemistry
1 answer:
vaieri [72.5K]3 years ago
5 0

Answer:

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What are the functional groups in oxybenzone?
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Oxybenzone contains ether, phenol and ketone (-CO) functional group alonq with two aromatic rings.

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Which weather condition is NOT associated with warm fronts??
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A Winter storm usually does not come with a warm fronthey warm front.

Explanation:

When the front passes over an area it means to change in the weather. Many. Many friends cause weather events such as rain thunderstorms gusty winds tornadoes and hurricanes.

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2 years ago
Use the Nernst equation to calculate the concentration of the unknown solution. Base this on your experimental voltage of 1.074
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0.3793 M

Explanation:

The unknown metal is zinc. So the equation of the reaction is;

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From Nernst equation;

E = E° - 0.0592/n log Q

[Cu2+] = 0.050179 M

n = 2

[Zn^2+] = ?

E = 1.074 V

E° = 0.34 - (-0.76) = 1.1 V

Substituting values;

1.074  = 1.1 - 0.0592/2 log [Zn^2+]/0.050179

1.074 - 1.1 = - 0.0592/2 log [Zn^2+]/0.050179

-0.026 = -0.0296  log [Zn^2+]/0.050179

-0.026/-0.0296 = log [Zn^2+]/0.050179

0.8784 =log [Zn^2+]/0.050179

Antilog(0.8784) = [Zn^2+]/0.050179

7.558 =  [Zn^2+]/0.050179

[Zn^2+] = 7.558 * 0.050179

[Zn^2+] = 0.3793 M

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if a leaf falls from a tree we assume that it is in free fall and not affected by air resistance, how many force vectors does th
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In photosynthesis-
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A.

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