# 2 liters of alkadiene has a mass equal to 4.82 g. Derive the molecular formula of alkadiene.

October 13, 2021 | education

| The volume of alkadiene is 2 liters.

The mass of alkadiene is 4.82 g.

Let’s determine the molecular formula of this alkadiene.

First, we write down the general formula for alkadienes.

CnH2n-2.

First, we determine the molar mass of the compound.

n = m / M.

n = V / Vm.

M = m * Vm / V.

M = 4.82 * 22.4 / 2 = 54.

We write the expression.

12n + 2n – 2 = 54.

14n – 2 = 54.

14n = 54 + 2.

14n = 56.

Let’s define the unknown value of n.

n = 56/14 = 4.

The result is an answer equal to 4.

We get the following formula.

C4H6.

This compound is called butadiene.

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