# Does a mole always have the same mass?

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Because different molecules and atoms do not have the same mass, one mole of one thing does not weigh the same as one mole of something else. Atoms and molecule mass is measured in amu. One amu is equal to one gram per mole. This means that if an atom has a mass of one amu, one mole of this atom weighs one gram.

## Do all moles have the same mass?

Just as the dozen donuts, dozen flowers, and dozen eggs did not all have the same mass or weigh the same, a mole of any particle will not have the same mass or weigh the same as a mole of another particle.

## Why isn’t the mass of a mole always the same?

A mol is a number of particles, but it is tied to weight in a screwy way because it is the number of particles required to give a certain weight, but the weight is not a constant number. The weight is relative to the atomic weights (or molecular weights) of the different elements and molecules.

## Does molar mass equal 1 mole?

The molar mass of a substance is the mass in grams of 1 mole of the substance. As shown in this video, we can obtain a substance’s molar mass by summing the molar masses of its component atoms. We can then use the calculated molar mass to convert between mass and number of moles of the substance.

## Does a mole measure mass?

Moles measure the number of particles, not the mass.

## What is 1g mole?

A mass of a substance in grams numerically equal to its molecular weight. … Example: A gram-mole of salt (NaCl) is 58.44 grams.

## Why are 1 mole the atomic mass?

The mole was defined by International Bureau of Weights and Measures as “the amount of substance of a system which contains as many elementary entities as there are atoms in 0.012 kilogram of carbon-12.” Thus, by that definition, one mole of pure 12C had a mass of exactly 12 g.

## Why do 1 mole of different elements have different masses?

Consistent with its definition as an amount unit, 1 mole of any element contains the same number of atoms as 1 mole of any other element. The masses of 1 mole of different elements, however, are different, since the masses of the individual atoms are drastically different.

## Is the mass of 1 mole of O and 1 mole of S same?

O molecules contains 6.022 x 1023 molecules. 1 mole contains 6.022 x 1023 entities (Avogadro’s number) Concept 1. … One atom of sulfur has a mass of 32.07 amu; one mole of S atoms has a mass of 32.07 g.

## Is the molar mass the same as atomic mass?

Answers. Molar masses of the elements are the same numeric value as the masses of a single atom in atomic mass units but in units of grams instead. Molar masses of compounds are calculated by adding the molar masses of their atoms.

## Why is a mole 6.022 x10 23?

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.

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