Give two reasons why a 100% yield is not obtained in actual chemical manufacturing process.

Reasons why a 100% yield is not obtained in actual chemical manufacturing processes may be;

- The reactor has a certain capacity to produce a certain yield  

- There is a limiting reactant that runs out and the reaction can not proceed any further

It may also be because the reaction is reversible or because of loses of desired product during isolation and purification.  

because natural gas is colorless, odorless, and tasteless, distributors add mercaptan (a chemical that smells like sulfur) to give natural gas a distinct unpleasant odor (it smells like rotten eggs). they locate the types of rock that are likely to contain natural gas deposits.