How many atoms in one gram?

Answer 1

To find the number of atoms in a gram you must have the identity of the substance (the molar mass) and solve for the number of moles in 1 gram

moles= 1gram / molar mass of substance

# atoms = (moles)(Avogadro's number)

Answer 2

Conversion factor between atomic mass units and gramsThe standard scientific unit for dealing with atoms in macroscopic quantities is the mole (mol), which is defined arbitrarily as the amount of a substance with as many atoms or other units as there are in 12 grams of the carbon isotope C-12. The number of atoms in a mole is called Avogadro's number, the value of which is approximately 6.022 × 1023 mol-1. One mole of a substance always contains almost exactly the relative atomic mass or molar mass of that substance (which is the concept of molar mass), expressed in grams; however, this is almost never true for the atomic mass. For example, the standard atomic weight of iron is 55.847 g/mol, and therefore one mole of iron as commonly found on earth has a mass of 55.847 grams. The atomic mass of an 56Fe isotope is 55.935 u and one mole of 56Fe will in theory weigh 55.935g, but such amounts of pure 56Fe have never existed.

One gram of 56Fe would contain the molar number divided by either 55.847 or 55.935 (the atomic weight). This would be 1.078 x 1022 atoms or 1.076 x 1022 atoms.

Answer 3

There are approximately 6 x 10^22 atoms in one gram of an element, given Avogadro's number (6.022 x 10^23) and the average Atomic Mass of elements.

Answer 4

There are 1.258 _ 10 22 atoms in one gram of titanium. There also are 22 electrons in one single gram of titanium.

Answer 5

1 mole Mg = 6.022 x 1023 atoms

1 mole Mg = 24.3050g (atomic weight in grams)

1g Mg x (1mol/24.3050g) x (6.022 x 1023atoms/mol) = 2 x 1023 atoms (rounded to 1 significant figure)