Composition:
5.9% Hydrogen and 94.1% Oxygen (by mass)
in a 100 gram sample:
5.9 gram Hydrogen
94.1 gram Oxygen
<u>Finding the number of moles:</u>
<u>Moles of Hydrogen:</u>
moles = given mass/ molar mass
moles = 5.9 / 1 [molar mass of Hydrogen = 1g/mol]
moles of hydrogen = 5.9 moles
<u>Moles of Oxygen:</u>
number of moles = given mass / molar mass
number of moles = 94.1 / 16 [molar mass of Oxygen = 16g/mol]
moles of Oxygen = 5.88 ≈ 5.9 moles
<u>Empirical Formula:</u>
Moles of Hydrogen : Moles of Oxygen
5.9 : 5.9
Moles of Hydrogen : Moles of Oxygen = 1:1
Empirical Formula = OH