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GENERAL CHEMISTRY

chemistry ethics

What is the empirical formula of a compound containing 43.40% sodium (Na), 11.32% Carbon (C) and the rest oxygen? What is the empirical formula of a 10.0 gram compound containing 23.08% Aluminum (Al), 15.38% Carbon (C), and the rest oxygen? What is the molecular formula of an organic compound containing 40.0% Carbon (C), 6.67% Hydrogen (H), and 53.33% Oxygen (O) if its molecular mass is 180 amu? MOLE CONCEPT Formula Mass – the sum of the atomic weights of the atom in its empirical formula. Molecular Mass – average mass as calculated by adding together the atomic weights of the atoms in the molecular formula. Molecular Formula – indicates the type & number of atoms in a molecule Ex: Molecular Formula of Glucose is C6H12O6 Empirical Formula – a.k.a. the simplest formula used to indicate the mole ratio of elements present in a compound.