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emperical formula full details how to bulid
Firstly you have to calculate the number of moles of each of the element separately then the number of moles are divided by the smallest number of mole, if it is coming in a whole number, we make a formula. But if it comes in a decimal, we multiply it with the number to make it a whole number.
You can follow the steps:
Determination of empirical formula of a compound
Step 1: Write down the percentage composition and the atomic weight of each element present in the given compound.
Step 2: Divide the % ratio of each element by its atomic weight. The ratio gives the number of atoms of each element or relative number of atoms in the compound.
Step 3: a) Select the smallest ratio amongest the relative number of atoms and divide the remaining ratios by it to give the simplest ratio of atoms present in the compound.
b) If the simplest ratio is not a whole number, multiply each ratio by the smallest suitable integer so that a whole number ratio is maintained.
c) Write the empirical formula showing the atoms in the proper simple ratio of whole numbers.