Write the number of atoms of each element found in one unit of the compound:

a.) potassium iodide, ki
b.) sodium sulfide, na2s
c.) silicon dioxide, sio2
d.) carbonic acid, h2co3

The number of atoms found in each element is equal to Avogadro's number which is equal to 6.022 x 1023 atoms per mole element.
1. potassium and iodine each contain  6.022 x 1023 atoms per mole element.2. there are 2 atoms of Na, hence there are 1.2044 x1024 atoms Na but still  6.022 x 1023 atoms per mole S3.  6.022 x 1023 atoms per mole Si and 1.2044 x1024 atoms O4. 1.2044 x1024 atoms H, 6.022 x 1023 atoms per mole C and 1.8066 x1024 O