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Ber [7]
3 years ago
15

Answer fast please What system is the heart part of

Chemistry
2 answers:
natita [175]3 years ago
7 0

Answer:

A. Circulatory System

Lyrx [107]3 years ago
6 0
The heart is a part of the Circulatory system.
You might be interested in
The following figure represents the formation of an ionic compound. Substances A and B are initially uncharged, but when mixed e
Brums [2.3K]

Answer:

This question is incomplete

Explanation:

This question is incomplete but some general explanation provides a clear answer to what is been asked in the question.

An ionic/electrovalent compound is a compound whose constituent atoms are joined together by ionic bond. Ionic bond is a bond involving the transfer of valence electron(s) from an atom (to form a positively charged cation) to another  atom (to form a  negatively charged anion). The atom transferring is usually a metal while the atom receiving is usually a non-metal.

For example (as shown in the attachment), in the formation of NaCl salt, the sodium (Na) transfers the single electron (valence) on it's outermost shell to chlorine (Cl) which ordinarily has 7 electrons on it's outermost shell but becomes 8 after receiving the valence electron from sodium. It should also be noted that Na is a metal while Cl is a non-metal.

6 0
3 years ago
What do atoms make up
kumpel [21]
Atoms make upthey make up oxygen
8 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
What is the minimum (non-zero) thickness of a benzene (n = 1.501) thin film that will result in constructive interference when v
ad-work [718]

Explanation:

At each reflecting surface (benzene and glass) there will be 180 degree phase change.

Now, for constructive interference the optical path in benzene is \lambda.

Formula to calculate thickness of a benzene thin film is as follows.

     Optical path length through benzene (\lambda) = 2 \times n \times d

Hence, substituting the given values into the above formula as follows.

    Optical path length through benzene = 2 \times n \times d

                   d = \frac{\text{Optical path length through benzene}}{2 \times n}

                       = \frac{\lambda}{2 \times n}  

                       = \frac{615 \times 10^{-9}}{2 \times 1.501}   (as 1 nm = 10^{-9}m

                       = 204.9 m          

Thus, we can conclude that minimum thickness of benzene is 204.9 m.

4 0
3 years ago
The process in which a large atom is split into two smaller atoms and releases energy is called
vazorg [7]
Answer is: <span>nuclear fission.
</span>Fission is nuclear reaction<span> or a </span>radioactive decay<span> process in which the </span>nucleus of an atom splits, <span>resulting atoms are not the same </span>elements<span> as the original atom</span>. The fission reaction<span> releases large amount of </span>energy.
<span>Nuclear fission was discovered on 1938.</span>
8 0
4 years ago
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