Question

Calculate the number of moles of K3PO4 in 6.49 X 1024 K3PO4 formula units.

Answer 1

10.78moles

Explanation:

Avogadro's hypothesis gives us a background understanding that 1mole of any substance contains 6.02x10^23 atoms.

Now, If 1 mole of K3PO4 contains 6.02x10^23 atoms,

Then Xmol of K3PO4 will contain = 6.49x10^24 atoms i.e

Xmol of K3PO4 = 6.49x10^24/6.02x10^23 = 10.78moles