Question

what is the difference between empherical and molecular formula? a compound contain 69.9% iron,30.1% Oxygen it's molar mass is 160g. what are empherical and molecular formula?​

Answer 1

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What is the difference between empherical and molecular formula?

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$\huge{molecular formula}$

A molecular formula is a chemical formula that provides the number of each type of atom in a molecule.

$\huge{empirical formula}$

An empirical formula is a chemical formula that tells you a simple, whole number ratio for the atoms in a molecule.

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A compound contain 69.9% iron,30.1% Oxygen it's molar mass is 160g. what are empherical and molecular formula?

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The iron oxide has 69.9% iron and 30.1% dioxygen by mass.

Thus, 100 g of iron oxide contains 69.9 g iron and 30.1 g dioxygen.

◻The number of moles of iron present in 100 g of iron oxide are

$◻ \frac{69.9}{55.8} = 1.25$

◻The number of moles of dioxygen present in 100 g of iron oxide are

$◻ \frac{30.1}{32} = 0.94$

Therefore ,

Ratio of oxygen atom to no of carbon atom present in one formula unit of iron oxide is

$◻ \frac{2 \times 0.94}{1.25} = \frac{1.5}{1}$

Ratio is 3 :1

Hence, the formula of the iron oxide is Fe²O³

Answer 2

Answer:

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