posted by KB on .
A mixture of carbon and sulphur has a mass of 9.0 g. Complete combustion with excess oxygen gives 22.6 g of a mixture of carbon dioxide and sulphur dioxide. Find the mass of sulphur in the original mixture
Let x = mass C
and y = mass S
Two unknowns require two equations and solve them simultaneously.
x + y = 9.0
x(molar mass CO2/atomic mass C) + y(molar mass SO2/atomic mass S) = 22.6
Solve for y.
Post your work if you get stuck.