Question

in propane molecule the ratio of c-c bonds to c-h bond is

Answer 1

The chemical formula of propane is C3H8. 

Propane has single bonds between the carbon atoms (C-C-C) and 3 hydrogen atoms attached to the terminal carbons while only 2 hydrogen atoms are attached to the central atom by a single bond. 

This accounts for 2 C-C bonds and 8 C-H bonds resulting in a ratio of 1:4.