Question

Calculate the number of water molecules and numbers of atoms of oxygen and hydrogen in 2.5moles of h2o water

Answer 1

1 mole of water = 6.022 × 10^23 molecules of water
then 2.5 moles = 2.5× 6.022×10^23 = X molecules .
now 1 molecule of water has 2 H atoms and 1 oxygen atom. so
no. of H atoms will be 2X and no. of Oxygen atoms will be X .

Answer 2

here are two hydrogen atoms per water molecule. There are 6.022x10^23 water molecules per mole. To calculate for 5 moles, (2 H atom)/(H2O molecule) X (6.022x10^23 H2O molecules)/(mole) X 5 moles = 6.022x10^24