To calculate the number of atoms in a sample, divide its weight in grams by the amu atomic mass from the periodic table, then multiply the result by Avogadro’s number: 6.02 x 10^23.

## What is number of gram atom?

The term gram-atom (abbreviated gat.) has been used for a related but distinct concept, namely a quantity of a substance that contains Avogadro’s number of atoms, whether isolated or combined in molecules. Thus, for example, 1 mole of MgB2 is 1 gram-molecule of MgB2 but 3 gram-atoms of MgB2.

## How many atoms are in 1g of lead?

That is 1 mole or 207.2 grams of Pb contains 602,000,000,000,000,000,000,000 atoms of Pb. The sum of individual atoms can be used to find the mass of a molecule. The mass of hydrogen peroxide, H2O2 would be calculated like this: H2O2 has 2 hydrogen atoms and 2 oxygen atoms in it.

## How many atoms are in a gram of gold?

How many atoms of gold(proton number 79) are there in a pure gold ring with a mass of 3.94g? many atoms or molecules, atoms in this case, contained in your object. 30,573,183,730,000,000,000 = 30.573 Billion-Billion Atoms of Gold in 1 gram.

## How many atoms are in 24 grams of carbon?

Because Carbon’s Molar Mass is about 12 grams (the actual number is 12.011, which isn’t a large enough difference to have an especially relevant effect), this means we have 2 moles of Carbon. In one mole of atoms, there are 6.02*10^23 atoms. Therefore, in two moles of atoms, there are 1.204*10^24 atoms.