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If 1/6, in place of 1/12, mass of carbon atom is taken to be the relative atomic mass unit, the mass of one mole of a substance will:
- a)Decrease twice
- b)Increase two folds
- c)Remains same
- d)Be a function of the molecular mass of element
Correct answer is option 'C'. Can you explain this answer?
Verified Answer
If 1/6, in place of 1/12, mass of carbon atom is taken to be the relat...
1 atomic mass unit on the scale of 1/6 of C12 = 2 amu on the scale of 1/12 of C12.
Now, atomic mass of an element
= Mass of one atom of the element/ 1 amu (Here on the scale of 1/6 of C-12)
= Mass of one atom of the element/ 2 amu (Here on the scale of 1/12 of C-12)
Numerically the mass of a substance will become half of the normal scale.
The correct option is A.
Most Upvoted Answer
If 1/6, in place of 1/12, mass of carbon atom is taken to be the relat...
Mass of Carbon Atom
The mass of a carbon atom is usually taken to be 1/12th of the mass of a carbon-12 atom, which is defined as 12 atomic mass units (u). This is because carbon-12 is the most abundant isotope of carbon and was chosen as the reference standard for atomic mass.
Given that the relative atomic mass unit is defined as 1/12th the mass of a carbon-12 atom, we can say that the mass of a carbon atom is approximately 12 u.
Effect on the Mass of One Mole of a Substance
Now, let's consider the mass of one mole of a substance. A mole is a unit that represents the number of entities (atoms, molecules, ions, etc.) in a sample. One mole of any substance contains Avogadro's number of entities, which is approximately 6.022 x 10^23.
The molar mass of a substance is the mass of one mole of that substance. In other words, it is the sum of the atomic masses of all the atoms in one mole of the substance.
Since one mole of carbon atoms has a mass of approximately 12 grams (which is the molar mass of carbon), we can say that the mass of one mole of any substance is equal to its molar mass in grams.
Now, if we consider the scenario where the mass of a carbon atom is taken to be 1/6th of the mass of a carbon-12 atom (instead of 1/12th), the molar mass of carbon would be halved to 6 grams.
However, this change in the mass of carbon atoms does not affect the mass of one mole of a substance. This is because the molar mass of a substance is determined by the sum of the atomic masses of all the atoms in one mole of the substance, not by the mass of an individual atom.
Since the relative atomic mass unit is still based on the mass of a carbon-12 atom, the molar mass of a substance would remain the same, regardless of the change in the mass of a carbon atom.
Therefore, the correct answer is option 'C': The mass of one mole of a substance remains the same.
The mass of a carbon atom is usually taken to be 1/12th of the mass of a carbon-12 atom, which is defined as 12 atomic mass units (u). This is because carbon-12 is the most abundant isotope of carbon and was chosen as the reference standard for atomic mass.
Given that the relative atomic mass unit is defined as 1/12th the mass of a carbon-12 atom, we can say that the mass of a carbon atom is approximately 12 u.
Effect on the Mass of One Mole of a Substance
Now, let's consider the mass of one mole of a substance. A mole is a unit that represents the number of entities (atoms, molecules, ions, etc.) in a sample. One mole of any substance contains Avogadro's number of entities, which is approximately 6.022 x 10^23.
The molar mass of a substance is the mass of one mole of that substance. In other words, it is the sum of the atomic masses of all the atoms in one mole of the substance.
Since one mole of carbon atoms has a mass of approximately 12 grams (which is the molar mass of carbon), we can say that the mass of one mole of any substance is equal to its molar mass in grams.
Now, if we consider the scenario where the mass of a carbon atom is taken to be 1/6th of the mass of a carbon-12 atom (instead of 1/12th), the molar mass of carbon would be halved to 6 grams.
However, this change in the mass of carbon atoms does not affect the mass of one mole of a substance. This is because the molar mass of a substance is determined by the sum of the atomic masses of all the atoms in one mole of the substance, not by the mass of an individual atom.
Since the relative atomic mass unit is still based on the mass of a carbon-12 atom, the molar mass of a substance would remain the same, regardless of the change in the mass of a carbon atom.
Therefore, the correct answer is option 'C': The mass of one mole of a substance remains the same.
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If 1/6, in place of 1/12, mass of carbon atom is taken to be the relative atomic mass unit, the mass of one mole of a substance will:a)Decrease twiceb)Increase two foldsc)Remains samed)Be a function of the molecular mass of elementCorrect answer is option 'C'. Can you explain this answer? for Chemistry 2025 is part of Chemistry preparation. The Question and answers have been prepared according to the Chemistry exam syllabus. Information about If 1/6, in place of 1/12, mass of carbon atom is taken to be the relative atomic mass unit, the mass of one mole of a substance will:a)Decrease twiceb)Increase two foldsc)Remains samed)Be a function of the molecular mass of elementCorrect answer is option 'C'. Can you explain this answer? covers all topics & solutions for Chemistry 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for If 1/6, in place of 1/12, mass of carbon atom is taken to be the relative atomic mass unit, the mass of one mole of a substance will:a)Decrease twiceb)Increase two foldsc)Remains samed)Be a function of the molecular mass of elementCorrect answer is option 'C'. Can you explain this answer?.
If 1/6, in place of 1/12, mass of carbon atom is taken to be the relative atomic mass unit, the mass of one mole of a substance will:a)Decrease twiceb)Increase two foldsc)Remains samed)Be a function of the molecular mass of elementCorrect answer is option 'C'. Can you explain this answer? for Chemistry 2025 is part of Chemistry preparation. The Question and answers have been prepared according to the Chemistry exam syllabus. Information about If 1/6, in place of 1/12, mass of carbon atom is taken to be the relative atomic mass unit, the mass of one mole of a substance will:a)Decrease twiceb)Increase two foldsc)Remains samed)Be a function of the molecular mass of elementCorrect answer is option 'C'. Can you explain this answer? covers all topics & solutions for Chemistry 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for If 1/6, in place of 1/12, mass of carbon atom is taken to be the relative atomic mass unit, the mass of one mole of a substance will:a)Decrease twiceb)Increase two foldsc)Remains samed)Be a function of the molecular mass of elementCorrect answer is option 'C'. Can you explain this answer?.
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If 1/6, in place of 1/12, mass of carbon atom is taken to be the relative atomic mass unit, the mass of one mole of a substance will:a)Decrease twiceb)Increase two foldsc)Remains samed)Be a function of the molecular mass of elementCorrect answer is option 'C'. Can you explain this answer?, a detailed solution for If 1/6, in place of 1/12, mass of carbon atom is taken to be the relative atomic mass unit, the mass of one mole of a substance will:a)Decrease twiceb)Increase two foldsc)Remains samed)Be a function of the molecular mass of elementCorrect answer is option 'C'. Can you explain this answer? has been provided alongside types of If 1/6, in place of 1/12, mass of carbon atom is taken to be the relative atomic mass unit, the mass of one mole of a substance will:a)Decrease twiceb)Increase two foldsc)Remains samed)Be a function of the molecular mass of elementCorrect answer is option 'C'. Can you explain this answer? theory, EduRev gives you an
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