How much does an atom present in an element?
Solution:
The number of atoms present in an element depends on the atomic mass of the element and the amount of the element being considered.
One mole of an element contains Avogadro's number of atoms, which is approximately 6.022 x 10^23 atoms. This is known as the Avogadro constant.
For example, if we consider one mole of carbon, which has an atomic mass of 12.011, we know that it contains 6.022 x 10^23 atoms of carbon. However, if we only have a sample of carbon that weighs, say, 2 grams, we can use the atomic mass to determine how many atoms are present.
To do this, we need to convert the sample weight from grams to moles by dividing by the molar mass of carbon, which is 12.011 g/mol. In this case, 2 grams of carbon is equivalent to 2/12.011 = 0.166 moles of carbon.
Finally, we can use Avogadro's number to determine how many atoms are present in this sample. Multiplying 0.166 moles by Avogadro's number gives us approximately 1.0 x 10^23 atoms of carbon in this sample.
So in summary, the number of atoms present in an element depends on the amount of the element being considered and its atomic mass. One mole of an element contains Avogadro's number of atoms, which is approximately 6.022 x 10^23 atoms.