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sesenic [268]
3 years ago
12

Can anyone help me on this ques pls, much appreaciated

Chemistry
2 answers:
Bingel [31]3 years ago
8 0

Answer:

letter D po

Explanation:

sana makatulong po Ito

Sloan [31]3 years ago
4 0

Answer:

Option D is Correct answer

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In a chemical process, three bottles of a standard fluid are emptied into a larger container. A study of the individual bottles
Setler79 [48]

Answer:

a

The expected value is = 39 units

The standard deviation is = 0.1212 unites

b

The probability is = 0.2047 units

Explanation:

The explanation of this answer is shown on the first uploaded image

5 0
4 years ago
The absorbance of a 0.45 mol dm–3 solution of an aromatic amino acid, 3.0 cm thick is 0.22 at a wavelength of 295 nm:
34kurt

Explanation:

a) Using Beer-Lambert's law :

Formula used :

A=\epsilon \times C\times l

where,

A = absorbance of solution = 0.22

C = concentration of solution = 0.45 mol/dm^3=0.45 mol/L=0.45 M

1 dm^3 = 1 L

l = length of the cell = 3.0 cm

\epsilon = molar absorptivity of this solution = ?

Now put all the given values in the above formula, we get the molar absorptivity of this solution.

0.22=\epsilon \times (0.45 M)\times (3.0 cm)

\epsilon=0.163 M^{-1}cm^{-1}

Therefore, the molar absorptivity of this solution is, 1.93\times 10^{4}M^{-1}cm^{-1}

b) A=\log \frac{I_o}{I_t}

T=\frac{I_t}{I_o}

A=\log \frac{1}{T}

A = 2 × 0.22 =0.44

I_o,I_t = Intensities of Incident light and transmitted light respectively

T = Transmittance

0.44=\log \frac{1}{T}

T = 0.3630

c) I_o=x

I_t=65\% of x=0.65 x

Thickness of cell = l' =?

c = 0.75 mol/ dm^3=0.75 mol/L=0.75 M

A=\log \frac{I_o}{I_t}=\epsilon \times C\times l

\log \frac{x}{0.65x}=0.163 M^{-1}cm^{-1}\times 0.45 M\times l'

l' = 1.53 cm

d) No, we cannot calculate the absorbance at 590 nm from the given data. This is because absorbance at this wavelength  can be observe experimentally.

8 0
4 years ago
Why does graphite and diamond sublime?
GREYUIT [131]

Answer:

The intermolecular bonding in the solid is van der Waals dispersion forces. That means that it will have a lower melting point than diamond or graphite where you have giant covalent bonding. In fact C60 sublimes at 800 K (527°C). Diamond and graphite sublime at around 4000 K.

Explanation:

8 0
4 years ago
Sodium (Na) is in Group 1 of the periodic table. Sodium atoms readily form bonds with other atoms. Which statement best explains
kramer

Answer:

Explanation:

22

3 0
3 years ago
What is an example of a homogeneous mixture.
Murrr4er [49]
An example of a homogeneous mixture would be C. A solution. 
7 0
3 years ago
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