Determine the empirical and molecular formulae of a compound given the following percentage composition by mass:
4.07% hydrogen, 24.27% carbon, and 71.65% chlorine, with a molar mass of 98.96 g/mol.
1. CH2Cl and C2H4Cl2
2. CH3Cl and C2H6Cl2
3. C2HCl and C4H2Cl2
4. C2HCl and C2H4Cl2
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