\textbf{200.} The volume difference of 89.6 liters of the third member of the alkyne family and the same volume of the third member of the alkane family, both gases at STP conditions, with which hydrocarbon mass is equal?\\
$(H = 1, C = 12 : \text{g.mol}^{-1})$
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(1) ethane \qquad\qquad (2) ethyne\\
(3) second member of the alkane family \qquad (4) second member of the alkyne family
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\textit{[Space for calculations]}
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