Does it mean "My country is small so there is no beer."?

If that is the case, can I also say "ビールがないので国は少ない。"?

Yes, you can.

It means "to not be played" in #5.

かける (transitive) = to play (songs on the stereo, radio. etc.)

かかる (intransitive) = to be played

These verbs have so many meanings.

No, it does not.

「ビールがない国は少ない。」 means something completely different.

Literally, "Countries with no beer are rare."
________

"ビールがないので国は少ない。" makes no sense. That means "Because there is no beer, countries are few."

Thanks for the detailed explanation, masaegu.

Hi, is my translation correct for the above sentence?

"Please give me cola if there is no beer."

Correct but please do not forget that the point I am trying to make with these sentences is about the use of 「が」 in subordinate and relative clauses.

Thanks, masaegu.