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3 years ago

Which of the following requires the most input of energy?

Chemistry

2 answers:

Korvikt [17]3 years ago

7 0

Vaporizing a substance so the answer is D

g100num [7]3 years ago

6 0

Answer : The correct option is, (D) vaporizing a substance

Explanation :

During the phase change, the energy is required to change the bonding between the molecules.

Melting : It is a phase change in which the solid state changes to the liquid state.

In the case of melting, the energy is added to break the bonds between the molecules.

Freezing : It is a phase change in which the liquid state changes to the solid state.

In the case of freezing, the energy is removed as the molecules bonded to one another.

Vaporization : It is a phase change in which the liquid state changes to the gaseous state.

In the case of vaporization, the more amount of energy is required to break the bonds between the molecules and need to escape into the atmosphere.

Hence, the vaporizing a substance requires the most input of energy.

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True or false: a mixture is always made up of a combination of elements

FromTheMoon [43]

A mixture has lots of different elements that are not necessarily bonded to each other, like sea water has lots of dirt, animals, and plant parts in it. Compared to a solution (strictly salt and water, which bond and ionize with each other).

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3 years ago

Do you know what each item in the central hazardous waste storage area is for?

Sonbull [250]

Answer:

- Bucket liner: a second layer of protection in the hazardous waste containers; they should be sealed with a knot.

- Hazardous bucket label: identifies facility and waste information and must be placed on used hazardous waste containers.

- Zip-tie tags: these are used to close and label bucket liners.

- Chemical bags: plastic bags used to store hazardous waste. They have a zip-type closure and should only store one hazardous waste item.

- Hazardous waste management chart: a job aid which displays how to determine a spill category and how to store hazardous waste until it is picked up.

Explanation:

Hello,

Hazardous waste is a type of waste that could be harmful for the health or the environment . Such waste could exhibit the following threats: ignitability , reactivity , corrosivity and toxicity

Hazardous wastes may be found in gaseous, liquid or solid forms. They can not be disposed of by typical methods like other by-products of our daily life. Based on the physical state of the waste, treatment and solidification processes might be required.

For the given options on the attached picture, each items match as follows:

- Bucket liner: a second layer of protection in the hazardous waste containers; they should be sealed with a knot.

- Hazardous bucket label: identifies facility and waste information and must be placed on used hazardous waste containers.

- Zip-tie tags: these are used to close and label bucket liners.

- Chemical bags: plastic bags used to store hazardous waste. They have a zip-type closure and should only store one hazardous waste item.

- Hazardous waste management chart: a job aid which displays how to determine a spill category and how to store hazardous waste until it is picked up.

Best regards.

5 0

3 years ago

According to the modern atomic model, electrons in an atom are always

babymother [125]

The electrons always orbit around the nucleus, forming what is called an electron cloud. :)

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3 years ago

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How can indicator be used to determine if a solution is an acid or base

dalvyx [7]

Answer:

To tell if something is an acid or a base, you can use a chemical called an indicator. An indicator changes color when it encounters an acid or base. There are many different types of indicators, some that are liquids and others that are concentrated on little strips of "litmus" paper.

Explanation:

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3 years ago

Magnesium has two electrons in its valence shell, whereas chlorine has seven. Which element is more likely to form a positive io

KatRina [158]

The answer would be Magnesium

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3 years ago