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Over [174]
3 years ago
7

Which reason best explains why metals are shiny?

Chemistry
1 answer:
ZanzabumX [31]3 years ago
5 0

Answer:

Best:

because their valence electrons absorb light

Minor:

because their valence electrons move to higher energy levels

Explanation:

When the electrons absorb light, they absorb this energy and they have a tedency to jump and get promoted to the high energy level.

As a result, they release out energy after being promoted. This energy is in form of light

.

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Molecules are made up of more than one<br><br> A. Proton<br> B. Electron<br> C. Atoms<br> D. Neutron
In-s [12.5K]

Answer:

c, atoms

Explanation:

Molecules are made up of atoms that are held together by chemical bonds. These bonds form as a result of the sharing or exchange of electrons among atoms. The atoms of certain elements readily bond with other atoms to form molecules. Examples of such elements are oxygen and chlorine.

(please answer my question :( )

6 0
3 years ago
¿Cuál de los siguientes no acelera a una reacción?
max2010maxim [7]

Answer:

The correct answer is B).

Explanation:

The factors that accelerate a chemical reaction are:

- Temperature: at a higher temperature, the speed of a reaction is increased.

- Pressure: the higher this is, the greater the collisions between molecules and an acceleration of the reaction speed will occur.

-Catalysts: correspond to substances that accelerate chemical reactions, an example are enzymes. There are catalysts that increase the reaction rate and others that generate the opposite effect (they are inhibitors).

There are also other factors that accelerate a chemical reaction such as the concentration of reagents.

7 0
4 years ago
A person who studies how sound waves move through water is involved in what branch of science? A. Space science O B. Life scienc
sladkih [1.3K]

Acoustics is a branch of physics that deals with the study of mechanical waves in gases, liquids, and solids including topics such as vibration, sound, ultrasound and infrasound.

6 0
3 years ago
Read 2 more answers
Evaluate (714 mm )/(37 s ) to three significant figures and express answer in si units using an appropriate prefix.
romanna [79]

The SI base units for length is meter (m) and for time is seconds (s).

The given ratio is \frac{714 mm}{37 s}

\frac{714 mm}{37 s} = 19.297 mm/s \simeq 19.3 mm/s

Converting mm/s to m/s as:

Since, 1 mm/s = 0.001 m/s

So, 19.3 mm/s = 0.0193 m/s

Since, zeroes to the left side of the non-zero number are not significant hence, the evaluation of \frac{714 mm}{37 s} to three significant figures and answer in SI units is 0.0193 m/s.

5 0
4 years ago
How would you separate a mixture of alcohol and water
Kisachek [45]
You can use fractional distillation
4 0
3 years ago
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