Question

How many oxygen atoms are present in 0.4 moles of ethanoic acid?

Answer 1

According to the mole concept: one mole of any compound contains one mole of each atom.

1 mole of CH₃COOH = 1 mole of oxygen

So, 0.4 moles of CH₃COOH = 0.4 moles of oxygen

So number of oxygen atoms = moles * avogadro number = 0.4 * 6.023 * 10²³

Number of oxygen atoms = 2.40 * 10²³ atoms