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3 years ago

Help with questions

Chemistry

1 answer:

gulaghasi [49]3 years ago

8 0

1) This type of energy transfer is called conduction.

2) Hydroelectricity

3) petroleum naphtha, gasoline, diesel fuel, asphalt base, heating oil, kerosene, liquefied petroleum gas, jet fuel and fuel oils. All of these come out of oil refining process

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Calculate the solubility of cux(ksp=[cu2+][x2−]=1.27×10−36) in a solution that is 0.190 m in nacn.

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The picture shows two liquid samples are poured into a beaker. As shown, the liquids don’t mix with each other. Which statement

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3 years ago

Determine the number of unpaired electrons in Ca?

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When an electron occupies an orbital of an atom singly, rather than an electron pair such electron is said to be an unpaired electron. Each atomic orbital of an atom specified by quantum numbers can contain a maximum of two electrons having opposite spins, electron pair.

The numbers of unpaired electrons are determined by the electronic configuration of an atom. The electronic configuration of calcium, $Ca$ is:

$1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}4s^{2}$ or $[Ar]4s^{2}$

Since, from the electronic configuration it is clear that the number of electrons in valence orbital that is $4s$ is 2 that means the electrons are paired up in the valence orbital so, there are no unpaired electrons present in $Ca$ .

Hence, the number of unpaired electrons in $Ca$ is 0.

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