Question

How many Co atoms equal a mass of 28.09 amu

Answer 1

Therefore, carbon is taken as the reference for the determination of atomic masses. What is Atomic Mass? Atomic mass of an element is the number of times an atom of that element is heavier than an atom of carbon taken as 12. One atomic mass unit is equal to one-twelfth of the mass of an atom

A mole is defined as 6.022 * 10^23 atoms/molecules/what have you. So one atom would be a 1/(6.022*10^23) fraction of a mole. The special thing about a mole is that if you have a mole of any given atom or molecule, the weight of the mole in grams is equal to the mass of the atom or molecule in amu.



It is expressed as a multiple of one-twelfth the mass of the carbon-12 atom, 1.992646547 × 10−23 gram, which is assigned an atomic mass of 12 units. In this scale 1 atomic mass unit (amu) corresponds to 1.660539040 × 10−24 gram.

Missing: co ‎28.09