Which contains the greatest number of moles of oxygen atoms? 1. 1 mol

1.	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. 1 mol of ethanol C₂H₅OH (ethanol) – Molar mass = 24 + 6 + 16 = 46 46 g of ethanol contains 1 × 6.023 × 10²³ number of oxygen atoms. 2. 1 mol of formic acid. HCOOH (formic acid) – Molar mass = 2+12 + 32 = 46 46 g of HCOOH contains 2 × 6.023 × 10²³ number of oxygen atoms. 3. 1 mol of H₂ O H₂O (water) – Molar mass = 2 + 16 = 18 18 g of water contains 1 × 6.023 × 10²³ number of oxygen atoms. ∴ 1 mole of formic acid contains the greatest number of oxygen atoms.

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. 1 mol of ethanol

C₂H₅OH (ethanol) – Molar mass

= 24 + 6 + 16

= 46

46 g of ethanol contains 1 × 6.023 × 10²³ number of oxygen atoms.

2. 1 mol of formic acid.

HCOOH (formic acid) – Molar mass

= 2+12 + 32

= 46

46 g of HCOOH contains 2 × 6.023 × 10²³ number of oxygen atoms.

3. 1 mol of H₂ O

H₂O (water) – Molar mass

= 2 + 16

= 18

18 g of water contains 1 × 6.023 × 10²³ number of oxygen atoms.

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