Question

Question #2ca85

Answer 1

First, you run a gas chromatogram using 1-chlorobutane and 1-bromobutane as standards.

This enables you to determine which compound has which retention time.

You probably found that 1-chlorobutane elutes first.

Then you use the procedure here to determine the mole percent of each compound.

You can then use the molar masses to convert mole percent to mass percent.