Unit 1.3: Elemental Composition of Pure Substances
Determine the empirical formula of a compound given data.
A compound contains 40.0% carbon, 6.7% hydrogen, and 53.3% oxygen by
mass. Find its empirical formula.
Apply the Law of Definite Proportions to determine the ratio of atoms in
a compound when given mass amounts.
How many grams of Oxygen (O) are in a 36 g sample of water (H₂O)?
Determine the empirical formula of a compound using gravimetric analysis
lab data.
Magnesium metal (Mg) reacts with oxygen gas (O2) to form
magnesium oxide (MgxOy) when heated. Use the lab
data to determine the empirical formula of magnesium oxide. Mass
of sample before heating : 1.00g, Mass of sample after heating: 1.66g.
