4. A 0.750g sample of tin metal reacts with 0.201g of oxygen gas to form tin oxide. Calculate the empirical formula of the tin oxide. 5. A 1.164g sample of iron filings reacts with chlorine gas to give 3.384g of iron chloride. Calculate the empirical formula of the product. 6. A sample of phosphorous weighing 0.500g was ignited to the oxide in a stream of oxygen gas. What is the empirical formula of phosphorous oxide if the product has a mass of 1.145 g? What is the molecular formula of phosphorus oxide if the molar mass is 285g/mol