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zlopas [31]
2 years ago
10

In vacuum, the speed of light is c= 2.998 x 108m/s. However, the speed generally decreases when light travels through media othe

r than vacuum. Then, the speed is approximately c divided by a quantity called the medium's refractive index (7). In which of the following, would the frequency of 210nm-light be the lowest? (c = 2v) (1) H2, n = 1.0001 (2) CCl4, n = 1.461 (3) H20, n = 1.3330 (4) silicone oil, n = 1.520 (5) diamond, n = 2.419
Chemistry
1 answer:
Kaylis [27]2 years ago
4 0

Answer:

Light of wavelength 200 nm will have lowest frequency in while traveling through diamond.

Explanation:

Speed of the light in vacuum = c

Relation between speed of light , wavelength (λ) and frequency (ν);

\nu =\frac{c}{\lambda }

Speed of light in a medium = c' = c/n

\nu =\frac{c'}{\lambda }=\frac{c}{n\times \lambda }...[1]

Where : n = refractive index of a medium

So, the medium with greater value of refractive index lower the speed of light to greater extent.

From [1] , we can see that frequency of light is inversely proportional to the refractive index of the medium :

\nu \propto \frac{1}{n}

This means that higher the value of refractive index lower will be the value of frequency of light in that medium or vice-versa.

According to question, light of wavelength 200 nm will have lowest frequency in while traveling through diamond because refractive index of diamond out of the given mediums is greatest.

Increasing order of refractive indices:

H_2

Decreasing order of frequency of light 210 nm in these medium :

H_2>H_2O>CCL_4>\text{Silicon oil}> Diamond

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Answer:

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Explanation:

Buffer capacity is defined as the moles of an acid or base that are needed to change the pH of a buffer in 1 unit.

A more concentrated solution of acetic buffer contains more moles of the acid per liter of solution. A solution that contains more moles of the acetic ion or the acetic acid requires more moles of base or acid to change the pH, that means:

The more concentrated acetic acid buffer has a better buffer capacity because requires more moles of acid or base to change the pH than a more diluted acetic acid buffer.

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3 years ago
Compound A reacts with Compound B to form only one product, Compound C, and it's known the usual percent yield of C in this reac
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The usual percent yield of C in this reaction is 40%.

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Solution :

We know, % yield is given by :

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Putting given values , we get :

40 = \dfrac{6.4}{theoretical\ yield }\times 100\\\\theoretical\ yield=\dfrac{6.4\times 100}{40}\\\\theoretical\ yield=16\ g

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3 years ago
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the same

Explanation:

Within the nucleus of individual atoms of the same element, the proton number is the same.

All atoms of the same kind from the same element have the same number of protons.

The number of protons does not change, it remains fixed after a chemical reaction.

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But atoms of the same element have the same number of protons in them.

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The required amount of silver nitrate to produce 16.2g of silver is 25.48 grams.

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Moles of silver = 16.2g / 107.8g/mol = 0.15mol

From the stoichiometry of the given reaction it is clear that, same moles of silver nitrate is required to produce same moles of silver. So 0.15 moles of silver nitrate is required.

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2 years ago
What happens ????????
ivolga24 [154]
Correct me if I wrong but I think it's "c"
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3 years ago
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