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Tema [17]
4 years ago
8

Please help me with this question

Chemistry
1 answer:
Rufina [12.5K]4 years ago
3 0
The correct awnser is c
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How does a material get a positive charge?
adoni [48]

Answer:

positive charge comes from having more protons than electrons; negative charge comes from having more electrons than protons charge is quantized, meaning that charge comes in integer multiples of the elementary charge e

Explanation:

3 0
3 years ago
1.00 gram of a compound requires the following quantities of solvent to dissolve: 147.0 mL of water, 8.10 mL of chloroform, 37.0
vodomira [7]

Answer:

Partition coefficients are:

Chloroform-Water: 18.1

Diethyl ether-Water: 3.97

Benzene-Water: 1.71

You would choose chloroform to extract the compound

Explanation:

Partition coeffcient is defined as the ratio between solubility in g/mL of an organic compound and concentration of the solubility in an aqueous solution.

Solubility of the compound in the solvents is:

Water: 1g / 147.0mL = 6.80x10⁻³g/mL

Chloroform: 1g / 8.10mL = 0.123g/mL

Diethyl ether: 1g / 37.0mL = 0.0270g/mL

Benzene: 1g / 86.0mL = 0.0116g/mL

<h3>Partition coefficients are:</h3><h3>Chloroform-Water: 18.1</h3><h3>Diethyl ether-Water: 3.97</h3><h3>Benzene-Water: 1.71</h3><h3 />

The higher partition coefficient, the best extraction because the compound will have more affinity with this solvent in which the compound has the best solubillity.

Chloroform has the higher partition coefficient because has the higher solubility. That means chloroform is the solvent you would choose to extract the compound from an aqueous solution

3 0
4 years ago
HELP Sometimes a retired military vessel is hauled out to sea and
Nata [24]

Answer:

probably B, a new habitat is created that supports several kinds of life.

Explanation:

6 0
3 years ago
A chemistry teacher adds 50.0 mL of 1.50 M H2SO4 solution to 200 mL of water. What is the concentration of the final solution? U
Aleks [24]
Hello!

The concentration of the final solution when a<span> chemistry teacher adds 50.0 mL of 1.50 M H2SO4 solution to 200 mL of water is 0,3 M

To calculate that, you'll need to use the dilution law, where initial and final concentrations are M1 and M2 respectively, and initial and final volumes are V1 and V2, as shown below. Keep in mind that the final volume is the sum of the 200 mL of water and the 50 mL of H</span>₂SO₄ that were added by the teacher. 

M2= \frac{M1*V1}{V2}= \frac{1,50 (mol H_2SO_4/L)*50mL}{(50 mL + 200 mL)}=0,3(mol H_2SO_4/L)

Have a nice day!
6 0
3 years ago
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An electromagnetic device used to determine the masses of individual atoms is
xxTIMURxx [149]
Mass spectrometry was discovered by Francis Aston, a British Physicist, in 1919. This involves separating mixtures of substances into their components and transforming them into beams of particles and subsequently, bending them with the use of electricity and magnetism to come up with a spectrum that is inherently unique for every individual atoms for easy identification.
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4 years ago
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