The hydrocarbon contains 93.3% carbon and 7.7% hydrogen, density 1.161 g / l. Chemical formula of hydrocarbon

W (el) = Аr (el) × n / Mr
Where “Ar” is the atomic mass of the element; “n” is the number of atoms of this element in the substance; Mr is the molar mass of the substance.
Based on this formula, we find “n”:
n = w (e) × Mr / Ar (e)
Knowing the density, you can find the molar mass of this substance:
Mr = ρ × Vm = 1.161 × 22, 4 = 26 (g / mol)

n (C) = 0.933 × 26/12 = 2
n (H) = 0.077 × 26/1 = 2
The formula for the hydrocarbon is C2H2.
Checking its molecular weight:
Mr (C2H2) = 12 × 2 + 1 × 2 = 26 g / mol. So this is acetylene.