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3 years ago

9

Look at the diagram below.

2 answers:

Ronch [10]3 years ago

8 0

Answer:

<h3>Ray 3 is the reflected ray</h3>

=>reflection of light may occur whenever light travels from a medium of a given refractive index into a medium with a different refractive index. In the most general case, a certain fraction of the light is reflected from the interface, and the remainder is refracted.

Kazeer [188]3 years ago

5 0

Answer:

3rd statment

Explanation:

ray 1 and 2 are same vertical line

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2 Calculate What is the density of a liquid with a mass of 17.4g<br> and a volume of 20 mL?

jolli1 [7]

Answer:

P= 0.87g/mL or 0.87g/cm^3

Explanation:

P=m/v

P=density

P=17.4g/20mL

P= 0.87g/mL

1mL=1cm^3

8 0

4 years ago

A solution contains 0.021 M Cl and 0.017 M I. A solution containing copper (I) ions is added to selectively precipitate one of t

lidiya [134]

<u>Answer:</u> Copper (I) iodide will precipitate first.

<u>Explanation:</u>

We are given:

$K_{sp}$ of CuCl = $1.0\times 10^{-6}$

$K_{sp}$ of CuI = $5.1\times 10^{-12}$

Concentration of $Cl^-\text{ ion}=0.021M$

Concentration of $I^-\text{ ion}=0.017M$

Solubility product is defined as the product of concentration of ions present in a solution each raised to the power its stoichiometric ratio.

<u>For CuCl:</u>

$K_{sp}=[Cu^+][Cl^-]$

Putting values in above equation, we get:

$1.0\times 10^{-6}=[Cu^+]\times 0.021$

$[Cu^+]=\frac{1.0\times 10^{-6}}{0.021}=4.76\times 10^{-5}M$

Concentration of copper (I) ion = $4.76\times 10^{-5}M$

<u>For CuI:</u>

$K_{sp}=[Cu^+][I^-]$

Putting values in above equation, we get:

$5.1\times 10^{-12}=[Cu^+]\times 0.017$

$[Cu^+]=\frac{5.1\times 10^{-12}}{0.017}=3.00\times 10^{-10}M$

Concentration of copper (I) ion = $3.00\times 10^{-10}M$

For the precipitation of copper (I) ions, we need less concentration of copper (I) ions. So, copper (I) iodide will precipitate first.

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4 years ago

Which one of these is an element?<br> a. air <br> b. water <br> c. oxygen <br> d. sodium chloride

Anastasy [175]

C.) Oxygen is an element among them...

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4 years ago

In which isine is the strong nuclear force na strong enough to balance destuetatic forces between Gond?

romanna [79]

Answer:

neon 21 ang sagot diyan

Explanation:

iyan ang sagot ko its a frank hindi yan ang sagot ko

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3 years ago

Which situation shows a nonrenewable resource in use?

miv72 [106K]

Answer:

B

Explanation:

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1 year ago