Siplle explanatio of hydrocarbons a and b both contains 85.7% carbon .Their molar masses are 42 and 84 respectively
Hydrocarbons are organic compounds made up of carbon and hydrogen atoms. In this case, hydrocarbons A and B both contain 85.7% carbon, which means that the rest of the composition is hydrogen.
The molar mass of hydrocarbon A is 42, which suggests that it is a smaller molecule with a lower number of atoms. The molar mass of hydrocarbon B is 84, indicating that it is a larger molecule with a higher number of atoms.
Overall, both hydrocarbons A and B have similar carbon compositions but differ in size and complexity based on their molar masses.