Hennes kompetens passar för ansvarsområdet.

Hennes means her, and it is correct here because the owner is not the grammatical subject.

In this sentence, the subject is hennes kompetens. The noun kompetens is what passar.

Swedish uses sin/sitt/sina only when the possessor refers back to the subject of the clause. Compare:

• Hon gillar sin bok. = She likes her own book.
• Hon gillar hennes bok. = She likes another woman’s book.

In Hennes kompetens passar för ansvarsområdet, the sentence is talking about her competence, so hennes is the natural choice.

Not exactly.

In Swedish, kompetens often means:

• expertise
• qualifications
• skill set
• professional ability

So in work-related contexts, kompetens is often broader and more positive than English competence, which can sometimes sound like just being adequate.

Here, hennes kompetens is closer to her expertise or her qualifications than just her competence.

Because hennes already works as the determiner, just like her in English.

You can think of:

• hennes kompetens = her expertise

Just as English does not say the her expertise, Swedish does not add another article here.

Also, kompetens is being used as a general, uncountable quality, not as one single countable item.

Passar för means something like:

• is suitable for
• fits
• is a good match for

So Hennes kompetens passar för ansvarsområdet means that her expertise is suitable for that area of responsibility.

The verb passa is very common in Swedish, and its exact meaning depends a lot on the preposition used with it.

Because passa för is the standard pattern when you mean be suitable for something.

Some useful comparisons:

• passa för = be suitable for
• passa i = look good in
  
  • Den färgen passar dig i den där skjortan.
• passa till = go well with / match
  
  • Det här vinet passar till fisken.
• passa på = take the opportunity
  
  • Jag passar på att fråga nu.

So in your sentence, för is the natural choice because the idea is suitability.

It is a compound noun:

• ansvar = responsibility
• område = area

Together, ansvarsområde means area of responsibility or responsibility area.

The s in the middle is a common linking sound in Swedish compounds.

Then ansvarsområdet is the definite form, meaning:

• the area of responsibility
• the responsibility area

Because the last part of the compound, område, is an ett noun:

• ett område = an area
• området = the area

In Swedish compounds, the final part decides the gender of the whole word. So:

• ett ansvarsområde
• ansvarsområdet

That final definite ending is the Swedish way of saying the.

It follows normal Swedish main-clause word order:

• Hennes kompetens = subject
• passar = finite verb
• för ansvarsområdet = prepositional phrase

So the structure is basically:

• Subject + verb + prepositional phrase

This is the most neutral word order.

Also, Swedish main clauses usually follow the V2 rule, which means the finite verb comes in the second position. In this sentence, the subject comes first, so the verb naturally comes right after it.

It is understandable and grammatically fine, but many speakers might choose a slightly more natural or more idiomatic version depending on context.

Common alternatives include:

• Hennes kompetens passar bra för ansvarsområdet.
• Hon har rätt kompetens för ansvarsområdet.
• Hennes kompetens är väl lämpad för ansvarsområdet.

These can sound a little smoother, especially in professional or formal contexts.

Still, your original sentence is perfectly workable, and a learner should understand it as a correct sentence.