Tetraethyllead, the "lead" additive in leaded gasoline, has a percent composition by mass of 64.06% Pb,...

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Tetraethyllead, the "lead" additive in leaded gasoline, has a percent composition by mass of 64.06% Pb,...

Tetraethyllead, the "lead" additive in leaded gasoline, has a percent composition by mass of 64.06% Pb, 29.71% C and 6.23% H. What is the empirical formula of tetraethyllead?

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Answer 1

Answer #1

the empirical formula of a compound can be calculated using the following method

element	mass %	atomic weight	relative number of atom	simplest ratio	simplest whole number ratio
C	29.71	12	29.71/12=2.48	2.48/0.31=8	8
H	6.23	1	6.23/1=6.23	6.23/0.31=20	20
Pb	64.06	207	64.06/207=0.31	0.31/0.31=1	1

ratio between Pb:C:H =1:8:20

emperical formula containg Pb.C and H is PbC₈H₂₀

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Answer 2

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