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ale4655 [162]
2 years ago
6

Define physical change and chemical change. State which type of change occurs in each of the following statements:

Chemistry
1 answer:
Ad libitum [116K]2 years ago
6 0

A physical change is when a substance experiences a change in its physical characteristics.

For instance, cutting a diamond or a piece of glass

A chemical transformation is one in which one or more new compounds are created.

Iron rusting, for instance.

Both reversible and irreversible physical change are possible.

On the other hand, chemical change is a change that can never be reversed.

a) Electrolysis of molten MgCl2 involves chemical change since new materials are created and MgCl2 cannot be recovered.

The process of electrolysis involves passing an electric current through a substance to cause a chemical change.

Refer to this website to learn more about reversible changes: brainly.com/question/14831707

#SPJ4

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Atoms are real even though they're invisible.
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What is the best Explanation for why a cell might shrivel
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Do objects that give off light often give off heat?
pashok25 [27]

Answer:

Yes

Explanation:

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Other than providing vital oxygen, how else do plants support us, especially considering our diet of plants and animals (which c
arsen [322]

Plants serve as the main source of nutrition for humans as well as provide many products for human use, such as firewood, timber, fibers, medicines, dyes, oils, and rubber.

Plants are multicellular eukaryotic organisms whose mode of nutrition is mainly autotrophic.

Plants play many important roles in life more especially that of producing food on which many other organisms depend on.

Some of the important ways by which plants support human life include:

  1. Provision of food: plants trap the energy of the sunlight and through the process of photosynthesis produce food on which other living organisms such as animals depend on.
  2. Provision of oxygen: during the process of photosynthesis, plant release oxygen into the atmosphere which is needed by animals for respiration.
  3. Recycling of water: through the process of transpiration occurring in leaves of plants, water is recycled in nature.
  4. Provision of other products such as timber, fibers, medicines, dyes, oils, and rubber.

Therefore, plants serve as the main source of nutrition for humans as well as provide many products for human use, such as  timber, fibers, medicines, dyes, oils, and rubber.

Learn more about importance of plants at: https://brainly.in/question/237715

8 0
3 years ago
Calculate the amount of heat energy is needed to raise the temperature of 5.00 grams of lead from 25.0 to 35.0 degrees Celsius,
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