True or False. It is possible to find the empirical formula for a compound with the elements carbon, hydrogen, oxygen, and chlorine via combustion analysis.

Sample X has a molecular weight of 378.29 g and only contains C, H, and Cl. If 1.12 g X produces 1.57 g CO₂ and 0.56 g H₂O after combustion analysis, what is the molecular formula?

Calculate the empirical formula of a compound that only contains C, H, O, and F. 

A 7.03 g sample has undergone combustion and produced 13.0 g CO₂ and 4.26 g H₂O. 

A second sample of the compound that weighs 6.13 g is found to contain 0.98 g F.