2 years ago

Factors affecting movement of colored pigments in a paper chromatography

Chemistry

2 answers:

sergey [27]2 years ago

7 0

Suability of the solvent, molecular size of the solute

mixer [17]2 years ago

6 0

solubility of the solvent,

molecular size of the solute

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This beaker contains an aqueous solution of copper II nitrate.

alexgriva [62]

Answer:

See the answer below

Explanation:

<em>Aqueous solution of copper II nitrate contains solute of copper II nitrate dissolved in water</em>. The equation for the reaction is as below:

$Cu(NO_3)_2 (s)$ + $H_2O (l)$ --> $Cu(NO_3)_2 (aq)$

Hence, the solute chemical is copper II nitrate while the solvent is water.

Chemical formula of copper II nitrate - $Cu(NO_3)_2$

Chemical formula of water - $H_2O$

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2 years ago

What is the specific latent heat of fusion for a substance that takes 550 kJ to melt 14 kg at 262 K?

Ray Of Light [21]

Answer:

The answer is A

Explanation:

hope it helps

3 0

2 years ago

Mixing baking soda and vinegar is an example of an endothermic reaction. This means...

swat32

The answer would be A

4 0

2 years ago

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Calculate the mass of a body<br>Whose volume is<br>Is 2cm3 and<br> density is 520cm3

MrRissso [65]

Answer:

The answer is

Explanation:

Density = mass / volume

mass = density × volume

volume = 2cm³

density = 520g/cm³

mass = 2 × 520

= 1040g

Hope this helps you

6 0

2 years ago

er solutions can be produced by mixing a weak acid with its conjugate base or by mixing a weak base with its conjugate acid. The

liubo4ka [24]

Answer:

You need to add 19,5 mmol of acetates

Explanation:

Using the Henderson-Hasselbalch equation:

pH = pKa + log₁₀ [base]/[acid]

For the buffer of acetates:

pH = pKa + log₁₀ [CH₃COO⁻]/[CH₃COOH]

As pH you want is 5,03, pka is 4,74 and milimoles of acetic acid are 10:

5,03 = 4,74 + log₁₀ [CH₃COO⁻]/[10]

1,95 = [CH₃COO⁻]/[10]

<em>[CH₃COO⁻] = 19,5 milimoles</em>

Thus, to produce an acetate buffer of 5,03 having 10 mmol of acetic acid, you need to add 19,5 mmol of acetates.

I hope it helps!

7 0

3 years ago