Answer:
Models aren't always 100% accurate. The world is ever-changing and so is everything in it. There is no sure way to know that your model is accurate all the time. Also, models aren't always easy to read. Some people struggle to read models, therefore models cannot be used by everyone.
Explanation:
These are just two of the limitations. Let me know if you need more. Happy to help : )
There are 6.02x10^22 molecules of any atom/molecule in one mole of anything.
Therefore no. of atoms in 3.8 mols of Mercury= 3.8 * 6.02x10^22= 2.2876x10^23 atoms
<span>A population of the frogs that do not receive the UV radiation would work as a good control group. In this case, since the impact of the radiation is the variable under study, a group that receives no radiation, and thereby should not exhibit a change, would be a control group that could be compared against the frogs that do receive the radiation.</span>
I think the particle starts to move slowly around because no heat or pressure is applied to it
<u>True,</u> A mole of one substance has the same number of atoms as a mole of any other substance.
<h3>
What is a mole?</h3>
Mole, also spelled mol, in chemistry, a standard scientific unit for measuring large quantities of very small entities such as atoms, molecules, or other specified particles.
The mole designates an extremely large number of units, 6.02214076 ×
. The General Conference on Weights and Measures defined the mole as this number for the International System of Units (SI) effective from May 20, 2019. The mole was previously defined as the number of atoms determined experimentally to be found in 12 grams of carbon-12.
The number of units in a mole also bears the name Avogadro’s number, or Avogadro’s constant, in honour of the Italian physicist Amedeo Avogadro (1776–1856). Avogadro proposed that equal volumes of gases under the same conditions contain the same number of molecules, a hypothesis that proved useful in determining atomic and molecular weights and which led to the concept of the mole.
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