Pyridine is recovered from coke-oven gases and is used extensively in the chemical industry, in particular, in the synthesis of vitamins and drugs. Pyridine contains carbon, hydrogen, and nitrogen. A 0.546 g sample was burned to produce 1.518 g of carbon dioxide and 0.311 g of water. Determine the empirical formula of pyridine. Please show me step by step. I can't seem to figure this out.