Determine the molecular formula of the compound.

A compound is used as a gasoline additive. It has a molecular weight of 60.10 atomic mass units and an empirical formula of C3H8O. The molecular formula is C__H__O__.

Respuesta :

Answer : The molecular formula of the compound is [tex]C_3H_8O_1[/tex].

Solution : Given,

Molecular weight = 60.10 amu

Empirical formula = [tex]C_3H_8O[/tex]

Molar mass of carbon = 12.01 g/mole

Molar mass of hydrogen = 1.01 g/mole

Molar mass of oxygen = 15.99 g/mole

First we have to calculate the Empirical mass of [tex]C_3H_8O_1[/tex].

Empirical mass of [tex]C_3H_8O_1[/tex] = [tex](3\times 12.01g/mole)+(1\times 1.01g/mole)+(1\times 15.99g/mole)=53.03g/mole[/tex]

Now we have to calculate the molecular formula.

Divide the molecular weight by the empirical mass and then multiply the subscripts by this number.

[tex]\text{ Molecular formula}=\frac{\text{ Molecular weight}}{\text{ Empirical mass}}= \frac{60.10g/mole}{53.03g/mole}=1.133\approx 1[/tex]

Now multiply the subscripts by 1, we get the molecular formula of the compound.

Therefore, the molecular formula of the compound is [tex]C_3H_8O_1[/tex].

3, 8, 1

C3H8O1

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