Ex. 7 Read and translate the text

Hydrocarbons are a primary energy source for current civilizations. The predominant use of hydrocarbons is as a combustible fuel source. In their solid form, hydrocarbons take the form of asphalt (bitumen). People use the mixtures of volatile hydrocarbons as a propellant for aerosol sprays. Methane (CH₄) and ethane (C₂H₆) are gaseous at ambient temperatures and pressure cannot readily liquefy them. Chemists easily liquefy propane (C₃H₈) and it exists in ‘propane bottles’ mostly as a liquid. Chemists also easily liquefy butane (C₄H₁₀) and use it as a fuel. Pentane (C₅H₁₂) is a clear liquid at room temperature; people use it in chemistry and industry as an odorless solvent of waxes and high molecular weight organic compounds. Hexane (C₆H₁₄) is also a widely used non-polar, non-aromatic solvent. The C⁶ through C¹⁰ alkanes, alkenes and isomeric cycloalkanes are the components of gasoline. With the addition of carbon units, the simple non-ring structured hydrocarbons have higher viscosities, boiling points, solidification temperatures.