The number of co atoms in 2.2 mil of co

1.325 x 10²⁴ Co atoms

Explanation:

1 mol of any substance is made of 6.022 x 10²³ units, these units could be atoms making up elements of molecules making up a compound.

Therefore 1 mol of the element cobalt is made of 6.022 x 10²³ atoms of Co

so if 1 mol of Co contains - 6.022 x 10²³ atoms of Co

then 2.2 mol of Co contains - 6.022 x 10²³ /mol x 2.2 mol

number of Co atoms in 2.2 mol of Co is - 1.325 x 10²⁴ Co atoms

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