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liraira [26]
3 years ago
7

which statement best describes a mole? it is 12 units of a given substance. it contains 6.02 1023 grams of sodium chloride. it i

s the mass of 12 carbon atoms. it contains 6.02 1023 particles of a given substance.
Chemistry
2 answers:
Digiron [165]3 years ago
4 0

Answer:

The correct option is;

It contains 6.02 × 10²³ particles of a given substance

Explanation:

A mole of substance is the standard scientific unit of measurement for the quantity of the substance which is made up of a large number of small particles such as molecules, ions, atoms, electrons or other entities.

The General Conference on Weights and Measures defines the mole as the amount of a substance that contains 6.02214076 × 10²³ units of entities

The number 6.02214076 × 10²³, is also known as Avogadro's number.

Dmitriy789 [7]3 years ago
4 0

Answer:

D

Explanation:

on ed2020

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C. The thermal energy of a substance.

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Answer:

Final volume 30.513 L.

Explanation:

According to general gas equation:

P₁V₁/T₁ = P₂V₂/T₂

Given data:

Initial volume = 17 L

Initial pressure = 2.3 atm

Initial temperature = 299 K

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Final pressure = 1.5 atm

Solution:

P₁V₁/T₁ = P₂V₂/T₂

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V₂ = 2.3 atm × 17 L × 350 K / 299 K × 1.5 atm

V₂  =  13685 atm .L.  K  / 448.5 K . atm

V₂  = 30.513 L

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Solid, Liquid, Gas

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