GK
CHEMISTRY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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one mol of pure substance
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one liter of pure substance
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one kilogram of pure substance
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one gram of pure substance
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Detailed explanation-1: -Avogadro’s number is defined as the number of elementary particles (molecules, atoms, compounds, etc.) per mole of a substance. It is equal to 6.022 × 1023 mol-1and is expressed as the symbol NA. Avogadro’s number is a similar concept to that of a dozen or a gross.
Detailed explanation-2: -Avogadro’s number, number of units in one mole of any substance (defined as its molecular weight in grams), equal to 6.02214076 × 1023. The units may be electrons, atoms, ions, or molecules, depending on the nature of the substance and the character of the reaction (if any).
Detailed explanation-3: -The mole (abbreviated mol) is the SI measure of quantity of a “chemical entity, ‘’ such as atoms, electrons, or protons. It is defined as the amount of a substance that contains as many particles as there are atoms in 12 grams of pure carbon-12. So, 1 mol contains 6.022×1023 elementary entities of the substance.
Detailed explanation-4: -The definition of Avogadro’s number of 6.022 × 1023/mole is the number of atoms or molecules per one gram atomic weight. For one gram atomic weight of hydrogen with atomic weight of one gram, one mole of hydrogen contains 6.022 × 1023 hydrogen atoms.
Detailed explanation-5: -A mole is the amount (10) of material containing 6.02214 × 1023 particles.