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3 years ago

Why can pressure change state of matter?

1 answer:

8 0

If you use a vacuum chamber as an example. When you pump out all the air from a chamber, all the molecules that normally push down on you, are gone, so molecules that are inside the vacuum start to move quicker.

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Which of the following occurs when an electron moves from a higher energy shell to a lower energy shell?

AlexFokin [52]

When an electron moves from a higher energy shell to a lower one, energy in the form of light, more specifically a wavelength of a photon is released.

7 0

3 years ago

Which of the following statements about the greenhouse effect is false? Greenhouse gases include carbon dioxide, chlorofluorocar

7nadin3 [17]

B is definitely correct

5 0

3 years ago

When calcium metal (Ca) reacts with oxygen gas (O2), it produces the ionic compound calcium oxide (CaO). Write the balanced equa

malfutka [58]

The balanced chemical equation for the reaction is

2Ca(s) + O₂(g) → 2CaO(s)

and

The process meets the requirements to be considered a redox reaction.

From the question,

We are to write a balanced chemical equation for the reaction between Calcium metal and oxygen gas

The balanced chemical equation for the reaction is

2Ca(s) + O₂(g) → 2CaO(s)

This is the balanced chemical equation for the reaction

To determine whether the reaction meets the requirements to be considered a redox reaction,

We will define the term redox reaction

A redox reaction, also called oxidation-reduction reaction, is any chemical reaction in which the oxidation number of a participating chemical species changes.

From the balanced equation above we can observe that the oxidation number of the participating species(Calcium and oxygen) changed.

The oxidation number of Calcium changed from 0 to +2

and

The oxidation number of Oxygen changed from 0 to -2

∴ The process meets the requirements to be considered a redox reaction.

Hence, the balanced chemical equation for the reaction is

2Ca(s) + O₂(g) → 2CaO(s)

and

The process meets the requirements to be considered a redox reaction.

Learn more here: brainly.com/question/17716543

7 0

2 years ago

“Aqueous calcium hydroxide reacts with carbon

bulgar [2K]

Answer:

B. Ca(OH)2(s)+CO2(aq)-CaCO3(s)+H2O(aq)

6 0

3 years ago

An element has an atomic number of 29. The number of protons and electrons in a neutral atom of the element are *

nasty-shy [4]

The number of protons and electrons in a neutral atom of the element are;

D. 29 protons and 29 electrons

The atomic number of an element is equal to the number of protons in the nucleus of each atom of that element.

Thus copper has an atomic number of 29, all atoms of copper will have 29 protons.

8 0

3 years ago