CHEMISTRY MIDDLE SCHOOL

An acid, like HCI, would...

Answers

Answer 1
Answer:

Answer: melt

Explanation:
Answer 2
Answer: Probably ost likely melt.

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Can I have an example of both a chemical and physical change happening at the same time. It can’t be a burning candle, burning wood, or food chewing and digestion.

Answers

Quick lime is calcium oxide. Itis an example of physical and chemical change.

Explanation:

  • The physical change is water turning into steam while heating.
  • It’s a chemical change. Quicklime is calcium oxide (CaO). When water is added to the calcium oxide, it is converted to calcium hydroxide in the reaction:

                                   CaO + H₂O -> Ca(OH)₂

  • In geology when earthen materials are exposed to water and are weakened or decomposed.
  • This process is referred to as slaking. Thus, calcium hydroxide resulting from the treatment of quicklime reacting with water form slaked lime.

In a model of Earth's layers that is determined by physical properties, how might the atmosphere be classified? Would it be part of the lithosphere or a seperate layer?

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Generally, the Earth is divided into spheres which include the "lithosphere" (land), "hydrosphere" (water), "biosphere" (living things), and "atmosphere" (air). The earth is divided into three layers based on chemical composition and these are the core, mantle and crust. In addition, the earth is also divided into physical properties which include lithosphere, athenosphere, mesosphere, outer core and inner core. Based on the given details, we can conclude that the atmosphere cannot be part of the lithosphere but instead, it is classified in a separate layer. The lithosphere only consists the outermost, rigid part of the Earth, which are the crust and the mantle. Hope this answer helps.

Is the Coriolis effect caused by the jet stream.

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YES!!!!!!!!!!!!!!!!!!!!!

How can quartzite be distinguished from quartz sandstone? A. The mineral compositions are different.

B. Quartzite is not granular, while sandstone is granular.

C. Quartz sandstone has undergone metamorphism, while quartzite has not.

D. A broken piece of quartzite will break through, not around, quartz sand grains.

Answers

D. A broken piece of quartzite will break through, not around, quartz sand grains.

Quartzite and quartz sandstone have the same chemical formula (SiO_2)

Quartzite is a metamorphic rock. Heat and pressure have compressed the sand into a strong network of interlocking quartz grains.

Quartzite is so tough that it breaks through the sand grains rather than around them as in sandstone.

Answer:

D. A broken piece of quartzite will break through, not around, quartz sand grains

Explanation:

:)

What is it when a cup of ice turns to water

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I don't really know what your question is asking so I am just going to list a few facts that I think might be what you are asking.

Ice turning into water is a physical change.  The ice is undergoing the process of melting which does not change it chemically (ice and water are chemically identical in the sense that they are both composed of H₂O molecules) and the only difference between water and ice is that water molecules have a higher average amount of energy than the ice molecules do.  When a substance melts, the molecules within the substance gain energy (in the form of heat) which allows them to break the intermolecular forces keeping them together.  Since the melting of ice requires energy, the process is endothermic which means that the ice had to get energy from its surroundings and that water has more energy than ice does as a result of the process (ΔH is positive).

I hope that helps.  Let me know in the comments if anything is unclear or if I did not answer your question.

Answer:

The freezing point is the temperature at which a liquid turns to a solid. ... This temperature is referred to as the melting point when temperatures rise above 32°F (0°C), causing ice to melt and change state from a solid to a liquid (water), as happened with the cup of crushed ice at room temperature.

Explanation:

The freezing point is the temperature at which a liquid turns to a solid. ... This temperature is referred to as the melting point when temperatures rise above 32°F (0°C), causing ice to melt and change state from a solid to a liquid (water), as happened with the cup of crushed ice at room temperature.

When an electric kettle containing cold water is switched on, the water in it starts boiling after a few minutes. What is the source of the heat energy of the boiling water? (3 points)a. Mechanical energy from the power socket

b. Newly created energy that increased the total energy

c. Mechanical energy from the heating element in the kettle

d. Already existing energy that was present in some other form

Answers

Answer:

c. Mechanical energy from the heating element in the kettle
C is correct
Hope you do good
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