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Activity Discussion Science & Technology chemistry : mole concept

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• # chemistry : mole concept

Posted by on June 24, 2023 at 11:47 am

what is the difference gram atomic mass and absolute atomic mass?

replied 3 months, 1 week ago 2 Members · 1 Reply
• ### Huzaifa

Member
June 24, 2023 at 12:25 pm
1

Gram Atomic Mass:
Gram atomic mass (also known as molar mass) refers to the mass of one mole of atoms of a particular element. It is expressed in grams. The gram atomic mass is obtained by summing up the atomic masses of all the atoms in a single molecule or formula unit of a substance. It is numerically equal to the relative atomic mass of an element expressed in grams.

Absolute Atomic Mass:
Absolute atomic mass refers to the mass of an individual atom of an element. It is usually expressed in atomic mass units (amu) or unified atomic mass units (u). The absolute atomic mass of an atom is determined by the sum of the masses of its protons, neutrons, and electrons. Since the mass of an electron is very small compared to protons and neutrons, it is often neglected when calculating the absolute atomic mass.

Example- Oxygen (O)

• Gram Atomic Mass: The gram atomic mass of oxygen is approximately 16 grams per mole. This means that one mole of oxygen atoms has a mass of 16 grams.
• Absolute Atomic Mass: The absolute atomic mass of an oxygen atom is approximately 16 atomic mass units (amu). This indicates that an individual oxygen atom has a mass of approximately 16 atomic mass units.

***In short the trick for it to remember while solving problems is that gram atomic mass is in grams whereas absolute atomic mass is in amu (their quantity remains same***

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