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sukhopar [10]
3 years ago
12

The atomic mass of magnesium is the weighted average of the atomic masses of

Chemistry
1 answer:
mojhsa [17]3 years ago
6 0
Of... its isotopes multiplied by each of their respective abundances
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1) In the boxes below, draw the model given in the simulation and draw a model of the molecules in an object when the object
sladkih [1.3K]

The molecules of the cold element are going to be closer together and still than the molecules of the hot element because the heat energy causes the molecules to be stimulated and to move.

<h3>How do molecules act at different temperatures?
</h3>

In the image you can see the behavior of the molecules when they are in different environments. On the right you see the cold molecules and on the left the hot molecules that are characterized by the following characteristics:

Cold molecules:

  • Molecules together.
  • Molecules with little movement.

Hot molecules:

  • Separate molecules.
  • Molecules with active movement.

A simple example to understand this behavior of molecules is water because:

  • When water is frozen its molecules are almost static and close together.
  • When the water is liquid and it is heated, the molecules move and that is why the water has bubbles, its molecules are separated.

Learn more about molecules in: brainly.com/question/19922822

6 0
3 years ago
The balanced chemical equation for the reaction between PCl5 and water is given below. If 3.45 moles of HCl are produced, how ma
enyata [817]
The coefficients of the substances give you the ratio of the number of moles.
The 4 before the H2O and the 5 before the HCl tell you that for every 5 moles of HCl created, 4 moles of H2O had to react.

Therefore:
(3.45mol HCl)(\frac{4 mol H2O}{5 mol HCl})
can be used to find the moles of H2O that react.

(3.45mol HCl)(\frac{4 mol H2O}{5 mol HCl}) = 2.76 mol H20
6 0
3 years ago
Is c2h2 polar or non polar?
Lyrx [107]

Answer:

polar beacuse there is no way its non polar.

3 0
3 years ago
Read 2 more answers
According to the arrhenius theory an acid is a substance that
Vsevolod [243]

Answer:

An acid is a substance that releases H⁺ in aqueous solution.

Explanation:

There are different acid-base theories, such as Arrhenius, Bronsted-Lowry, Lewis, etc.

According to the Arrhenius theory, an acid is a substance that releases H⁺ in aqueous solution.

HCl(aq) → H⁺(aq) + Cl⁻(aq)

On the other hand, according to the Arrhenius theory, a base is a substance that releases OH⁻ in aqueous solution.

NaOH(aq) → Na⁺(aq) + OH⁻(aq)

5 0
3 years ago
Read 2 more answers
What best describes the energy changes associated with evaporation and boiling
erik [133]

Answer:The statement 'atoms gain energy during evaporation and boiling' BEST describes the energy changes associated with evaporation and boiling.

In a given substance (e.g., water), atoms gain energy when they obtain kinetic energy, i.e. when they gain movement.

Evaporation refers to the physical process where a liquid is converted to a gas (in this case, water).

These processes (evaporation and boiling) increase the kinetic energy of water molecules to the detriment of the potential energy.

In conclusion, the statement 'atoms gain energy during evaporation and boiling' BEST describes the energy changes associated with evaporation and boiling.

4 0
2 years ago
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