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Serhud [2]
3 years ago
6

Determine the concentration of a solution prepared by diluting 20.0 ml of a 0.200 m rbcl to 250.0 ml. determine the concentratio

n of a solution prepared by diluting 20.0 ml of a 0.200 m rbcl to 250.0 ml. 0.00800 m 0.160 m 0.0160 m 0.0320 m 2.50 m
Chemistry
1 answer:
pogonyaev3 years ago
5 0
When dealing with making diluted solutions from concentrated solutions, we can use the following formula 
c1v1 = c2v2 
where c1 and v1 are the concentration and volume of the concentrated solution respectively.
c2 and v2 are the concentration and volume of the diluted solution respectively 
substituting these values in the above formula,
20 mL x 0.200 M = C x 250.0 mL 
C = 0.0160 M 
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Arrange the following kinds of electromagnetic radiation in order of increasing wavelength: infrared, green light, red light, ra
Marina86 [1]

Answer:

In the other of increasing wavelength we arrange as

<em>X-rays</em>

<em>ultraviolet</em>

<em>green light</em>

<em>red light</em>

<em>infrared</em>

<em>radio waves</em>

<em></em>

Explanation:

In the electromagnetic spectrum, wavelength decreases with increase in the energy of the electromagnetic wave. Since the e-m wave spectrum is arranged in the order of increasing energy (decreasing wavelength) as: Radio wave; infrared; visible light; ultraviolet; x-rays; gamma rays. Within the visible light, the green light has more energy than the red light. Therefore, the arrangement should be in the reverse direction of their increasing energy.

3 0
3 years ago
Tris is a weak base. The basic form of tris can be written tris0 and the protonated (conjugate acid) form can be written tris. T
Arada [10]

Answer:

a) [Tris0] : [Tris] = 1 : 100

b) Range = 7.1 to 9.1

Explanation:

a) Calculation of ratio of the basic and the acidic forms of tris

pH of a buffer is calculate using Henderson-Hasselbalch equation

pH = pKa+log\frac{Salt}{Acid}

Conjugate acid of Tris dissociated as

Tris \leftrightharpoons Tris0 + H^+

For tris,

Salt or Basic form = tris0

Acid or Acidic form = Tris

pKa = 8.1

pH = 6.1

pH = pKa+log\frac{Tris0}{Tris}

6.1 = 8.1+log\frac{Tris0}{Tris}

log\frac{Tris0}{Tris} = -2

\frac{Tris0}{Tris} = antilog (-2)

\frac{Tris0}{Tris} = 10^{-2}

[Tris0] : [Tris] = 1 : 100

b) Range of Tris

Range of any buffer is:

From (pKa -1) to (pKa+1)

So, range of Tris is:

From (8.1 - 1) to (8.1 +1)

or from 7.1 to 9.1

8 0
3 years ago
Show the relationship of number of moles and volume in Avogadro's law using data. Write your calculations and answer on a separa
leonid [27]

Answer:

See below ~

Explanation:

The calculated values of V/n :

⇒ 1.5/0.3 = 5

⇒ 3/0.6 = 5

⇒ 4.5/0.9 = 5

⇒ 6/1.2 = 5

⇒ 7.5/1.5 = 5

1. From this we understand that the calculated values of V/n remain constant, equal to <u>5</u> in this case.

2. The volume-mole graph will be a straight line passing through the origin. (Attached below)

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2 years ago
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rusak2 [61]

The outdoor temperature, also known as the ambient temperature, is a measure of the amount of heat in the environment and this depends on the kind of environment.

<h3>Temperature</h3>

The outdoor temperature around here is about 33 ^oC.

The temperature in the tropical area, where this area belongs, varies between 27 to 35 ^oC with an annual average of about 28 ^oC.

In order words, tropical regions are generally warm, unlike temperate regions.

Tropical regions also have two distinct seasons, the rainy and the dry seasons. This is unlike temperate regions that have summer, spring, winter, and autumn.

More on temperature can be found here: brainly.com/question/15267055

8 0
3 years ago
How many moles of CsXeF7 can be produced from the reaction of 12.5 LOL of celsium Fluoride with 10.0 mol of xenon hexafloride
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6 0
3 years ago
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