Which contains the greatest number of moles of oxygen atoms (i) 1 mol of ehtanol (ii) 1 mol of formic acid (iii) 1 mol of h2o

Explanation

1 mol of ehtanol : `C_2H_5OH` (ethanol)-
Molar mass `=24+6+16=46`.
46 g of ethanol contains `1xx6.023xx10^23` number of oxygen atoms.

1 mol of formic acid :`HCOOH` (formic acid)-
Molar mass `=2+32+12=46`.
46 g of formic acid contains `2 xx 6.023xx10^23`number of oxygen atoms.
1 mol of water: `H20`(water)-
Molar mass`=2+16=18`.
18 g of water contains `1xx6.023xx10^23` number of oxygen atoms.

formic acid, HCO2H, contains the greatest number of moles of oxygen atoms.