9. You are required to distinguish between two unknown substances blindfolded. You were told that the two substances are a mixture. What are the questions you would ask to identify the
types of mixture?

There is one s orbital, and there are three p orbitals, five d orbitals, and seven f orbitals. thus, the answer is b. do not confuse the number of orbitals in a subshell with the number of electrons the subshell can hold. each orbital can hold two electrons, so the capacity of an nf subshell is 14 electrons.

They carry out the exchange of gases as we breathe ( oxygen and carbon dioxide).

1. o2(g)as a product

The answer is 4 i don't know if its right let me see.