Apoteket ligger mittemot biblioteket, och bussen stannar längs samma gata.

Those endings mark the definite form in Swedish, the equivalent of the in English.

• ett apotek = a pharmacy

• apoteket = the pharmacy

• ett bibliotek = a library

• biblioteket = the library

• en buss = a bus
• bussen = the bus

In Swedish, the definite article is usually attached to the end of the noun instead of being a separate word.

It depends on the noun’s grammatical gender:

• en-word → definite singular usually ends in -en
• ett-word → definite singular usually ends in -et

So:

• en buss → bussen
• ett apotek → apoteket
• ett bibliotek → biblioteket

Unfortunately, you usually have to learn each noun together with en or ett.

In Swedish, ligga is often used for the location of places and buildings.

So:

• Apoteket ligger mittemot biblioteket = The pharmacy is located opposite the library

Using är would not sound as natural here. Swedish often uses:

• ligger for places/buildings being situated somewhere
• står for things standing upright
• sitter for things or people sitting
• är for identity, description, or general statements

So for locations, ligger is very common.

Mittemot means opposite, directly across from, or facing.

In this sentence:

• Apoteket ligger mittemot biblioteket
  = The pharmacy is opposite the library

It suggests the pharmacy is across from the library, usually on the other side of a street or open space.

No. In this kind of sentence, mittemot is normally used directly before the noun.

• mittemot biblioteket = opposite the library

You do not add a separate word like of or from after it.

Stannar is the present tense of stanna, which means stop.

So:

• bussen stannar = the bus stops

Here it means the bus makes a stop along that street.

Swedish often uses the present tense for general facts, regular situations, and things that normally happen.

So:

• Apoteket ligger ... describes a permanent location
• bussen stannar ... describes a usual or regular bus stop

This is very similar to English:

• The pharmacy is opposite the library
• The bus stops along the same street

Längs means along, and samma gata means the same street.

So:

• längs samma gata = along the same street

It suggests that the bus stops somewhere on that street, not necessarily right outside the pharmacy or library.

After samma, Swedish usually uses the noun without the definite ending.

So you say:

• samma gata = the same street
• samma bok = the same book
• samma hus = the same house

Even though English uses the in the same street, Swedish normally does not add the definite ending here.

Yes, but the meaning changes a little.

• på samma gata = on the same street
• längs samma gata = along the same street

På samma gata focuses more on location: something is on that street.
Längs samma gata emphasizes movement or placement spread along the street.

In this sentence, längs fits well because a bus stop happens somewhere along the street.

The basic word order is the normal Swedish main-clause pattern:

Subject + verb + other information

• Apoteket = subject
• ligger = verb
• mittemot biblioteket = location

And in the second clause:

• bussen = subject
• stannar = verb
• längs samma gata = location

So the structure is very straightforward here.

Och simply means and. It connects the two clauses:

• Apoteket ligger mittemot biblioteket
• bussen stannar längs samma gata

So the full sentence links two related facts.

It can appear, but Swedish often omits the comma before och in ordinary writing.

So many writers would also write:

• Apoteket ligger mittemot biblioteket och bussen stannar längs samma gata.

The comma is not necessarily wrong, but it is less necessary than in some English writing styles. In simple coordinated clauses, Swedish commonly leaves it out.

A rough guide:

• mittemot sounds approximately like MIT-teh-moht
• längs sounds roughly like lengs, but with the Swedish ä, which is like the vowel in British bed or men

A few tips:

• Stress in mittemot is usually on the last part: mitteMOT
• å in mot sounds like a long o
• ä in längs is more open than English a in cat

If you want to sound natural, it helps to listen to native audio, because Swedish vowel length and stress matter a lot.

Yes, absolutely. That is also correct Swedish.

• Mittemot biblioteket ligger apoteket.

Swedish follows the verb-second rule in main clauses. If you move a phrase like Mittemot biblioteket to the front, the verb still has to come second, so ligger comes before apoteket.

That version puts more emphasis on the location:

• Opposite the library is the pharmacy

Usually yes. Apotek is the normal Swedish word for pharmacy.

Depending on the variety of English, it may also be translated as:

• drugstore
• chemist’s
• pharmacy

But pharmacy is the safest general translation.