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Anna35 [415]
3 years ago
7

What SI unit is used to measure the number of representative particles in a substance?

Chemistry
2 answers:
weeeeeb [17]3 years ago
5 0

Answer: D. Mole

Explanation: A unit is defined as the standard of reference chosen to measure  any physical quantity.

A. Kilogram is the S.I unit of mass.

B. Ampere is the S.I unit of electric current

C. Kelvin is the S.I unit of temperature.

D. Mole is the S.I unit of mole of a substance. A mole is the amount of substance which contains as any elementary entities as there are atoms in 0.012 kg of carbon-12.

trapecia [35]3 years ago
3 0
Its D- Mole

Hope this helps : )
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P+Cl &gt; PCl3 <br>Equalize the following chemical equations​
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Write the full electron configuration of the Period 2 element with the following successive IEs (in kJ/mol):
Julli [10]

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Boron (B) is the element whose IE matches with our data.

Electronic Configuration of boron: 1s^22s^22p^1

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Ionization Energy (IE):

It is the minimum amount of energy which is required to remove the lose electron. If the electron is closer to the nucleus then greater amount of energy is required to remove the electron.

If we look from left to right in a period, ionization energy increases due stability of valance shell.

From the data given to us:

IE₁ = 801

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Boron (B) is the element whose IE matches with our data.

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