Question

A compound has an empirical formula of AB and a molar mass of 90 g/mol. What is its
molecular formula? (Molar mass of AB = 30 g/mol)

Answer 1

We have that the molecular formula  is mathematically given as

• C3H6O6

From the question we are told

• A compound has an empirical formula of AB and a molar mass of 90 g/mol.

• What is its molecular formula? (Molar mass of AB = 30 g/mol)

empirical formula

Generally the equation for the   is mathematically given as

The mass of the empirical formula is

C = 12

2H = 2*1 = 2

O = 1 * 16=16

T=30

The molecular mass is 90/30 = 3

The means you multiply the empirical formula by

3 (CH2O)_6

• C3H6O6

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