A compound is found to contain 30.7% Sulfur, 23,3% Magnesium and 46% Oxygen. What is the empirical formula of the compound?
- Change % of elements in to moles: 30.7 mol of S, 23.3 mol of Mg and 46 mol of O2.
- Find the mass of each of the elements: 30.7 mol / 32.06 g/mol = 0.96 g of S; 23.3 mol / 24.31 g/mol = 0.96 g of Mg; 46 mol / 16.00 g/mol = 2.88 g of O2;
- Divide the masses by the smallest mass: 0.96/0.96 = 1; 0.96/0.96 = 1; 2.88/0.96 = 3
- The empirical formula of this compound is MgSO3.
HK
Related Chemistry A Level answers
All answers ▸Sort the following compounds in order of increasing boiling point and explain your reasoning: hydrogen, hydrogen fluoride and hydrogen bromide
An alcohol, X has an Mr of 74 and percentage composition of 64.9% Carbon, 13.5% Hydrogen and 21.6% Oxygen. It does not turn potassium dichromate (VI) green. Determine the structural formula of X, and state its name.
Describe the trend in ionisation energies down group 1.
Why is benzene more stable than the theoretical model cyclohexa-1,3,5-triene?