Empirical and Molecular formula.

1.	Empirical and Molecular formula.
Answer» • Steps involved in the calculation of empirical formula : Convert the mass percentage into grams: considering 100 g of the compound, the given mass percentages represent the masses of the elements in grams. Calculate the number of moles of each element. Calculate the simplest molar ratio: divide the moles obtained by the least value from amongst the values obtained for each element. Calculate the simplest whole number ratio: multiply all the simplest atomic ratios by a suitable integer. Write the empirical formula: write the symbols of each element along with their whole number ratios side by side. • Molecular formula = empirical formula x n n = 1,2,3,…..etc. n = \(\frac{molar\, mass }{empirical \,formula \,mass}\)

Answer»

• Steps involved in the calculation of empirical formula :

Convert the mass percentage into grams: considering 100 g of the compound, the given mass percentages represent the masses of the elements in grams.
Calculate the number of moles of each element.
Calculate the simplest molar ratio: divide the moles obtained by the least value from amongst the values obtained for each element.
Calculate the simplest whole number ratio: multiply all the simplest atomic ratios by a suitable integer.
Write the empirical formula: write the symbols of each element along with their whole number ratios side by side.

• Molecular formula = empirical formula x n

n = 1,2,3,…..etc.

n = \(\frac{molar\, mass }{empirical \,formula \,mass}\)

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