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Tema [17]
3 years ago
10

Antibiotics do not reduce the number of helpful and harmful bacteria in the microbiome.

Chemistry
2 answers:
stira [4]3 years ago
7 0

Answer:

false; the purpose of antibiotics is to kill bacteria

Explanation:

mel-nik [20]3 years ago
4 0

It is true, it does reduce the number in both categories.

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Sonar is a technology that uses sound waves to calculate the distance to an object. Explain why you think sonar is useful for sc
Margarita [4]

Answer:

<em>Sonar can be used to measure the depth of the seabed or the distance of any object, animal or a man-made vessel any other objects </em>

Explanation:

  • A sound wave or sound pulse is projected into the water.
  • If any object tends to come in the way of the pulse, an echo is produced or the signal is reflected back.
  • A transducer measures the strength of this signal and hence determines the depth of the object or the sea.

This is much better way of measuring distances under the sea since light alone is not able to pierce through the ocean after a certain distance.

A powerful sonar blast can help in taking multiple measurements at a time, while even a laser will find it difficult to reach below 3 km of depth.

5 0
3 years ago
575 394 9550<br> bFzN0S<br> come study with me!
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Answer:

im good thxs for offering tho!

Explanation:

7 0
2 years ago
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How consumers affect which goods and services are produced.
oksano4ka [1.4K]
Consumers affect the goods and services produced through:

- The more we buy something the more popular it is and the more of it is made

- The products that is less popular and less made are because we don't buy them

- When we buy more of something the more expensive the product or service will be

- When we buy less of something the more cheaper that product or service will be

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6 0
3 years ago
Complete this equation for the dissociation of na2co3(aq). omit water from the equation because it is understood to be present.
Savatey [412]
Net overall dissociation:
Na2CO3 ---> 2Na(-) + CO3(2-)

*The ion charge is in parenthesis
6 0
3 years ago
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What should be the temperature of the solvent before adding it to the sample to be recrystallized?
Serhud [2]

Answer:

Near the boiling point of the solvent

Explanation:

The process of recrystallization is hinged on the fact that the amount of solute that can be dissolved by a solvent increases with temperature. The process involves creation of a solution by dissolving a solute in a solvent at or near its boiling point.  At the boiling point of the solvent, the solute has a greater solubility in the solvent; not much volume of  the hot solvent is required to dissolve the solute.

Before the solution is later cooled, you can now filter out insoluble impurities from the hot solvent. The quantity of the original solute drops appreciably because impurities have been removed. At this lower temperature, the solution becomes saturated and the solute can no longer be held in solution hence it forms pure crystals of solute, which can be recovered.

Recrystallization must be carried out using the proper solvent. The solute must be relatively insoluble in the solvent at room temperature but more soluble in the solvent at elevated temperature.

3 0
3 years ago
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