Question

A sample of vitamic C is known to contain 2.58 ×10²⁴ oxygen atoms. How many moles of oxygen atoms are present in the sample?

Answer 1

1 mole of oxygen atoms = 6.023×1023 atoms 

∴Number of moles of oxygen atoms =   2.58 ×10²⁴ / 6.022×10²³ 

                                                          = 4.28 mol 

4.28 moles of oxygen atoms.