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erica [24]
3 years ago
14

Which of the following gases has the highest average speed at 400k

Chemistry
1 answer:
Anna11 [10]3 years ago
7 0

Answer:

He

Explanation:

Helium will have the highest speed at the given temperature value because it has the lowest molecular mass.

According to Graham's law of diffusion "the rate of effusion or diffusion of a gas is inversely proportional to the square root of its molecular mass or density at constant temperature and pressure".

 In short, a gas with low molecular mass can diffuse or effuse more rapidly than one with a high molecular mass under the same condition.

Molecular mass of He  = 4.0026g/mol

                               Kr =  83.789g/mol

                               Ne = 20.1797g/mol

                               Ar = 39.948g/mol

He has the lowest molecular mass of the given choices.

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From this list, select the element that forms π bonds most readily. from this list, select the element that forms bonds most rea
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<span>C</span>

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3 years ago
If you were to use Lewis theory to predict the formula for the compound between rubidium and fluorine, it would most likely be:
goldenfox [79]

<u>Answer:</u> The formula of the compound formed between rubidium and fluorine is RbF

<u>Explanation:</u>

Ionic bond is defined as the bond which is formed by complete transfer of electrons from one atom to another atom.

The atom which looses the electron is known as electropositive atom and the atom which gains the electron is known as electronegative atom. This bond is usually formed between a metal and a non-metal.

Rubidium is the 37th element of the periodic table having electronic configuration of 1s^22s^22p^63s^23p^64s^23d^{10}4p^65s^1

This will loose 1 electron to form Rb^+ ion

Fluoride is the 9th element of the periodic table having electronic configuration of 1s^22s^22p^5

This will gain 1 electron to form F^- ion

To form RbF compound, 1 rubidium ion is needed to neutralize the charge on fluoride ion

The formation of the given compounds is shown in the image below.

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3 years ago
_ is the process in which an element spontaneously transforms into another isotope of the same element, or into a different elem
MariettaO [177]

Answer:

Nuclear transmutation

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The process in which an element spontaneously transforms into another isotope of the same element, or into a different element is called nuclear transumutation. It occurs when the number of protons or neutrons in the nucleus of an atom is changed.

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