Empirical Formulas
subscripts are mole-to-mole ratios
percentage
composition,
element A
molecular
weight A
Moles A
Moles B
percentage
composition,
element B
molecular
weight B
mole ratio
(subscripts)
What is the empirical formula of a purified drug sample that
is 74.27% C, 7.79% H, 12.99% N, 4.95% O?
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