Question

Which contains the greatest number of moles of oxygen atoms

1. 1 mol of ethanol
2. 1 mol of formic acid
3. 1 mol of H₂O

Answer 1

Compound	Given no. of moles	No. of oxygen atoms
Ethanol - C2H5OH	1	1 × 6.022 × 1023
Formic acid - HCOOH	1	2 × 6.022 × 1023
Water - H2O	1	1 × 6.022 × 1023

∴ 1 mole of formic acid contains the greatest number of oxygen atoms.