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4 years ago

Explain why atoms move at different speeds depending on whether they are in liquids or solids.

1 answer:

4 0

Atoms move at different speeds depending on whether they are in liquids or solids because the atoms or particles in solids are closely bonded while they are loosely bonded in liquids.


The attractive forces between the particles are so high that they remain in fixed positions. The particles, then, cannot slip over the neighbors particles. They can only vibrate. That is why solids have definite form and volume.

That the particles in liquids are loosely bonded means that the attractive forces are less compared with solids. Then the partilces can move and pass each other. They are not in fixed arrangements any more. Yet the particles are attracted to each other, so they have definite volume, although they take the form of the vessel, and they can flow.

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What is the total E associated with one mole of photons (a unit known as the Einstein) of 3.91x1019 Hz?

sashaice [31]

Answer:

$E=1.56\times 10^{10}J$

Explanation:

The energy of a photon, E, can be calculated with the Planck-Einstein equation:

$E=hf$

Where:

h is Planck's constant 6.626×10⁻³⁴ J.s, and

f is the frequency of the photon or electromagnetic radiation.

Substituting with your data:

$E=6.626\times 10^{-34}J.s\times 3.91\times 10^{19}s^{-1}=2.5908\times 10^{-14}J$

Now multiply by Avogadro's number to obtain the energy of one mole of photons:

$E=2.5908\times 10^{-14}J\times 6.022\times 10^{23}=1.56\times 10^{10}J$

8 0

3 years ago

List the symblos for the nine matalloids on the periodic table?

aleksklad [387]

As, Te, Ge, Si, Sb, B, Po, At, Se.

8 0

4 years ago

Fe-C-Cr alloy is covalent or ionic?

Vikentia [17]

Answer:

covalent....................

4 0

3 years ago

Given a balanced chemical equation it is always possible to determine

Alborosie

Answer:

C) the relative number of moles taking part in the reaction

Explanation:

From a balanced chemical equation, it is always possible to determine the relative number of moles taking part in a chemical reaction.

The number of moles is the amount of the reacting specie that makes up a chemical reaction.

In balanced chemical equation, the number of moles of reactants and products must be the same.
From this understanding, we can determine the amount of reactants and products needed for a chemical reaction to take place.

8 0

3 years ago

IS ANYONE GOOD AT CHEMISTRY?! like frr. I need help

wariber [46]

Yeah, what do you need help with?

8 0

3 years ago