What Is The Difference Between Empirical Formula And Molecular Formula The Moleculer Formula (MF) and the Empirical Formula

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The Moleculer Formula (MF) and the Empirical Formula

MF indicates the actual number and types of atoms in the molecule. It can be the same as the empirical formula or some simple multiple of it. Mathematically, MF = (EF) n, where (n) is an integer. For example, a CO2 molecule consists of one carbon atom with two oxygen atoms. Formula (CO2) is the molecular formula for carbon dioxide. It represents the actual composition of the molecule of the compound.

The molecular formula can be the same as the empirical formula as for CO2 or some simple multiple of EF. Thus, there is a mole of glucose, indicating that a glucose molecule consists of (6) carbon, (12) hydrogen, and (6) oxygen atoms, and its simplest atomic ratio, or EF, is (CH2O). Thus, the molecular formula of glucose (C6H12O6) is equal to (CH2O) or six times the empirical formula (CH2O).

It follows that the molecular formula of glucose is six times EF, which gives MF= (E. F)n, where (n) is an integer and n=6 in glucose.

mathematically,

n = MF weight

Weight of EF

For many molecules, MF and EF are the same, some examples are formaldehyde (CH2O), ammonia (NH3), and methane (CH4).

A formula that only gives the relative number of each type of atom in a molecule. In other words, the empirical formula may not give the actual number of atoms in the molecule. For example, the molecular formula of benzene is C6H6. This formula shows that a benzene molecule consists of (6) carbon atoms and (6) hydrogen atoms. The ratio of carbon (C) to hydrogen (H) atoms in this molecule is 6:6 or 1:1. Therefore, the empirical formula for benzene is written as (CH).

So the empirical formula tells us which elements are present and the simplest ratio of atoms, but not necessarily the actual number of atoms present in the molecule.

Let’s look at another example, the glucose molecule (C6H12O6), in which the ratio of C, H and O atoms is 6:12:6, or 1:2:1. The empirical formula of glucose is therefore (CH2O).

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