Answer:
20 x (6.022 x 10^23) atoms in 20 moles of Calcium.
Explanation:
A mole contains 6.022 x 10^23 atoms, which is also known as Avogadro's number, and this number is same for each element. So, there are 20 x (6.022 x 10^23) atoms in 20 moles of Calcium.
The number of atoms are there in 20 moles of calcium is 120.4 × 10²³.
Avogadro's number is the number which is equal to the number of atoms of any substance that are present in one mole of that substance, and it is equal to 6.022 × 10²³.
Given moles of calcium = 20 moles
So, number of atoms in given moles of calcium will be calculated as:
No. of Ca in 20 mol = 20mol × 6.022 × 10²³ atoms/mol = 120.4 × 10²³ atoms
Hence required atoms of calcium is 120.4 × 10²³.
To know more about avogadro's number, visit the below link:
https://brainly.com/question/1513182
