Introduction
Atom is the smallest unit of matter; A group of the same or different atoms joins together to make elements or compounds. One can calculate the number of atoms present in a certain amount of an element by using different formulas. The number of atoms of an element can also be converted to the number of moles. Different online calculators are also available today for the quick and accurate interconversions of units. Read on to know more about these online calculators.
What is a Mole?
Mole is the SI unit for the measurement of large quantities of elements and compounds. The mole is represented as “mol”. One mole of an element is equal to the 6.02 x 1023particles of that element. These particles can be either atoms or molecules. For example, one mole of iron contains 6.02 x 1023 atoms while one mole of water contains 6.02 x 1023 molecules.
Avogadro’s number
A scientist named “Lorenzo Romano Amedeo Carlo Avogadro” simply addressed “Avogadro” came up with the concept of mole and the quantity, 6.02 x 1023. This quantity is called “Avogadro’s number”. There is nothing special about this quantity. It is just used as a standard amount to carry out different measurements. Just as one dozen of eggs means 12 eggs same as Avogadro’s number means 6.02 x 1023 particles.
How do Convert the Number of Atoms to Moles?
The certain given number of atoms of an element is converted to its number of moles using the following formula
$$Mole\;=\;\frac{atoms}{Avogadro\;’s\;number}$$
We can convert the number of moles to atoms and vice versa using this formula. Now let us solve some examples for your practice
Example # 1
How many moles of chromium are present in the 7.1 x 104 number of atoms of chromium?
Let’s solve this problem using the above formula
Moles = Atoms / Avogadro’s number
Moles = 7.1 x 104 / 6.02 x 1023
Moles = 1.18 x 104-23
Moles = 1.18 x 10-19 mol.
Answer: hence, 7.1 x 1023 number of atoms of chromium is equal to 1.18 x 10-19 mol of chromium.
How to use the Online Calculator?
Following are the simple steps to use the online atoms to moles calculator
- Search the atoms to mole calculator in your browser.
- Type the given number of atoms in the atoms icon.
- Click the calculate button and you will get the converted number of moles.
FAQ's
The Mass of 6.02 x 1023 Atoms of Gold and Silver is Equal or not?
Avogadro’s number is a standard whose value is the same for all elements but this is not the case in terms of mass. The mass of different atoms is always different so, the mass of 6.02 x 1023 atoms of gold and silver is not the same.
Can we Calculate the Number of Atoms of an Element using the Atoms to Moles Formula?
Yes, we can calculate the number of atoms using the atoms to moles formula because both these values are interconvertible.
Atoms = Moles x Avogadro’s number
