Prior to their phaseout in the 1980s, chemicals containing lead were commonly added to gasoline as anti-knocking agents. A 5.021 g sample of one such additive containing only lead, carbon, and hydrogen was burned in an oxygen rich environment. The products of the combustion were 5.465 g of CO2(g) and 2.796 g of H2O(g). Insert subscripts below to appropriately display the empirical formula of the gasoline additive:
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