Answer:
because the number of constitutional confirmation , and geometric isomers goes up with each carbon atom added there are many more possible configurations and connectivities possible with decane , a 10 carbon chain , than with butane, a 4 carbon chain
I would assume carbon and water if not Im sorry.
B. Share Electrons.
Hope this helps.
This is a double replacement because both Copper and Sodium reacted with each other compounds , hence "double"