Which of the following molecular formulas are also empirical

Last updated: 7/28/2022

Which of the following molecular formulas are also empirical formulas? If the formula empirical formula, write the empirical formula for that molecule. a. Al₆O₉ b. PbO₂ c. MgCO₃ d. C₈H₁₈O₂ e. Si₃H₉O₂