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Lelu [443]
3 years ago
6

Which step of the scientific method includes a prediction?

Chemistry
1 answer:
faust18 [17]3 years ago
3 0

Answer:

B

Explanation:

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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
The reactant atoms are copper, hydrogen, nitrogen, and oxygen. Which reactant atom was oxidized in the reaction?
SCORPION-xisa [38]

Answer:

C. copper.

Explanation:

  • The atom which loses electrons (its oxidation sate be more positive) is the atom that is oxidized.
  • While, the atom which gains electrons (its oxidation sate be more negative) is the atom that is reduced.

  • Nitrogen:

It is oxidation sate is changed from (+5) in the reactants (NO₃⁻) to (+4) in the products (NO₂). N gains 1 electron

So, it is reduced.

  • Oxygen:

It is oxidation sate is the same (-2) in the reactants (NO₃⁻) and (-2) in the products (NO₂).

<em>So, it is neither be oxidized nor reduced.</em>

<em></em>

  • Copper:

It is oxidation sate is changed (0) in the reactants (Cu) to (+2) in the products (Cu²⁺). Cu loses 2 electrons.

<em>So, it is oxidized.</em>

<em></em>

  • Hydrogen:

It is oxidation sate is the same (+1) in the reactants (H⁺) and (+1) in the products (H₂O).

<em>So, it is neither be oxidized nor reduced.</em>

<em></em>

5 0
4 years ago
How much does the Earth weigh?​
ELEN [110]

5.972 × 10^24 kg

hope it helps

6 0
3 years ago
Read 2 more answers
All the processes that form mountain ranges are known as?
laiz [17]
All the processes that form mountain ranges are known as orogenesis. It is a process where a section of the Earth's lithosphere folds and deforms by compression forming mountain ranges this is due to movements of the tectonic plates. The forces or events that acts to this process are called oregony.
8 0
4 years ago
Your lab partner accidentally measures out too much of a substance in the lab. when the experiment is complete, you have leftove
Luden [163]
Ask a teacher and throw away properly.
6 0
4 years ago
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