The empirical formula of butadiene is $C_{2} H_{3}$ $C_2H_3$ . An experimental determination of the molar mass of butadiene yields the value of 54 g/mol. What is the molecular formula of butadiene?

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The empirical formula of butadiene is $C_{2} H_{3}$ $C_2H_3$ . An experimental determination of the molar mass of butadiene yields the value of 54 g/mol. What is the molecular formula of butadiene?

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Answer 1 · 2016-01-15T07:37:28

$C_{4} H_{6}$ $C_4H_6$

Explanation:

The molecular formula is always a mulitple of the empirical formula; of course the multiple may be one if the molecular formula is the same as the empirical formula.

Given that $MF$ $"MF"$ $=$ $=$ ${(EF)}_{n}$ $("EF")_n$ , we simply solve for $n$ $n$ using the sum of the constituent atomic masses:

$n \times (2 \times 12.011 + 3 \times 1.00794) \cdot g \cdot m o l^{- 1}$ $nxx(2xx12.011 + 3xx1.00794)*g*mol^-1$ $=$ $=$ $54$ $54$ $g \cdot m o l^{- 1}$ $g*mol^-1$

Clearly $n$ $n$ $=$ $=$ $2$ $2$ .

Molecular formula $=$ $=$ $2 \times C_{2} H_{3}$ $2xxC_2H_3$ $=$ $=$ $C_{29} H_{37} ? ?$ $C_29H_37??$

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The empirical formula of butadiene is $C_{2} H_{3}$ $C_2H_3$ . An experimental determination of the molar mass of butadiene yields the value of 54 g/mol. What is the molecular formula of butadiene?

1 Answer

Explanation:

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The empirical formula of butadiene is C2H3C_2H_3. An experimental determination of the molar mass of butadiene yields the value of 54 g/mol. What is the molecular formula of butadiene?

1 Answer

Explanation:

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The empirical formula of butadiene is $C_{2} H_{3}$ $C_2H_3$ . An experimental determination of the molar mass of butadiene yields the value of 54 g/mol. What is the molecular formula of butadiene?