How amu is equal to Molar Mass Must S33

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In summary, the conversation discusses the relationship between amu and molar mass, with the conclusion that 6.02x10^23 amu is equivalent to 1 gram. This is similar to how 2 kg is equal to 1 pound, with the analogy of defining a "gopher" as two of something. This explanation simplifies the concept of amu and molar mass, making it easier to understand.
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HussanAli
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How amu is equal to Molar Mass ... Must S33

Hey fellows I want to know that how amu is equal to molar mass of element. I think it's not possible unless weight of atoms of all elements is same. And by doing so it will mean that as Carbon-12 has molar mass of 12g and 12 amu then (if weight of all atoms are equal) one gram of any substance will be equal to one amu. Please explain. ( I am really tired of Wikipedia's complicated explanation.)
 
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amu is a unit selected in such a way that molar mass in grams equals (numerically) mass of the molecule (atom) expressed in amu. That's all.
 
  • #3


I think it should need more explanation.
 
  • #4


It all has to do with the fact that 6.02x1023 amu = 1g.

Here's a simpler analogy. A pound (Imperial weight unit) is equal to roughly 2 kg. Therefore, let's define a "gopher" as two of something. Now, let's say we have some rocks that each have a mass of 1kg. A "gopher" of rocks (two rocks) will have a mass of 2 kg or approximately one pound. Thus the mass of an individual rock in kg (1) is equal to the weight of one "gopher" of rocks in pounds (also 1).

Similarly, the mass of one atom in amu will be equal to the mass of a mole of that atom in grams simply because of the conversion between units above.
 
  • #5


That helped until I found the meaning of of Gopher.
 
  • #6


Check the meaning of mole.
 
  • #7


Yeah . You was also post same! thanks.
 

1. How is amu related to molar mass?

Amu, or atomic mass unit, is a unit of measurement used to express the mass of atoms and molecules. Molar mass, on the other hand, is a physical property of a substance that represents the mass of one mole of that substance. One amu is equal to one gram per mole, meaning that the atomic mass of an element in amu is equal to the molar mass of that element in grams per mole.

2. What is the conversion factor between amu and molar mass?

The conversion factor between amu and molar mass is 1 amu = 1 g/mol. This means that for every 1 amu, there is 1 gram per mole of that element or molecule.

3. Why is the amu unit used for atomic mass?

The amu unit is used for atomic mass because it is a more precise unit of measurement for very small masses, such as those of atoms and molecules. One amu is equal to 1/12 of the mass of a carbon-12 atom, making it a convenient unit for expressing atomic and molecular masses.

4. How is the molar mass of an element or molecule calculated?

The molar mass of an element or molecule is calculated by adding up the atomic masses of all the atoms present in that substance. This can be found on the periodic table, where the atomic mass of each element is listed below its symbol. For example, the molar mass of water (H2O) would be calculated by adding the atomic masses of 2 hydrogen atoms (1.008 amu each) and 1 oxygen atom (15.999 amu), resulting in a molar mass of 18.015 g/mol.

5. What is the difference between atomic mass and molar mass?

Atomic mass is a property of a single atom, while molar mass is a property of a substance that represents the mass of one mole of that substance. Atomic mass is measured in amu, while molar mass is measured in grams per mole. Additionally, atomic mass only takes into account the mass of the atom's protons and neutrons, while molar mass includes the mass of all the atoms present in a substance.

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