Indicate the alkane formula: a) C2H4 b) C4H8 c) C4H10 d) C2H5Cl

Alkanes include substances indicated under the letters: c) C4H10, d) C2H5CL.
The molecular formula corresponds to the general one for alkanes – CnH2n +2.
Let’s compose the abbreviated structural formulas:
H3C – H2C – H2C – CH3;
C4H10 – butane;
H3C – H2C – CL;
C2H5CL – chloroethane.
Alkane molecules are characterized by single “sigma” – bonds: C – C; C – H – which have a large supply of energy. The substances are of practical importance. Butane is a gas, in the composition of natural gas it serves as a fuel. Chloroethane is a halogenated derivative of ethane used as a solvent.