La sala ha cento posti.

Because Italian uses avere (to have) to talk about capacity in this kind of sentence.

• La sala ha cento posti = The hall/room has one hundred seats
• Italian treats posti as something the room has

Using è would mean is, which would not fit this structure.

Sala usually means room, hall, or salon, depending on context.

In a sentence like La sala ha cento posti, it often suggests:

• a hall
• a room
• a venue space
• sometimes a theater room or auditorium

The exact English word depends on the situation.

Italian uses definite articles much more often than English.

So la sala literally means the room/the hall, but in many cases English may translate it more naturally without stressing the.

The article la is used because:

• sala is a singular feminine noun
• Italian normally includes the article with nouns in this kind of statement

You can tell from the article la.

• la sala = feminine singular
• if it were masculine singular, you would expect il or another masculine article

Also, many Italian nouns ending in -a are feminine, though not all.

Ha is the third person singular of avere in the present tense.

So:

• io ho = I have
• tu hai = you have
• lui/lei ha = he/she has

In La sala ha cento posti, la sala is a singular subject, so ha is the correct form.

In modern Italian, the h in forms like ho, hai, ha, hanno is silent.

It is there mainly to distinguish these verb forms from other words:

• ha = has
• a = to / at

So the h helps with spelling and meaning, not pronunciation.

Cento means one hundred.

In this sentence, it stays cento because it is being used directly before the noun:

• cento posti = one hundred seats

It normally does not change for gender or number in this use.

Posti means places, spots, or seats, depending on context.

In places like theaters, halls, or cinemas, posti often refers to seating capacity rather than the physical chairs themselves.

So:

• cento posti = capacity for one hundred people / one hundred seats

By contrast, sedie would mean chairs, focusing on the objects.

The singular is posto.

• un posto = a place / a seat
• due posti = two places / two seats

Here it is plural because the sentence says cento posti.

Because the singular noun is posto, which is masculine.

So the forms are:

• il posto = the place/seat
• i posti = the places/seats

That is why the plural noun ends in -i.

Yes. That is often a very natural translation.

Depending on context, La sala ha cento posti can mean:

• The hall has one hundred seats
• The room seats one hundred
• The venue has space for one hundred people

All of these capture the basic idea of capacity.

No, this is a very normal Italian word order:

• La sala = subject
• ha = verb
• cento posti = object

So it follows the common pattern:

subject + verb + object

Yes, and that would be a slightly different way to express a similar idea.

• La sala ha cento posti = The hall has one hundred seats
• Ci sono cento posti nella sala = There are one hundred seats in the hall

Both are correct, but the focus is a little different:

• La sala ha... focuses on the hall and its capacity
• Ci sono... focuses on the existence of the seats

Yes, very often.

Posto is a very flexible word and can mean:

• place
• spot
• seat
• sometimes position

For example:

• un posto libero = a free seat / an empty place
• il mio posto = my place / my seat

In cento posti, the context strongly suggests seats or places available.

It would not be grammatically wrong, but it usually sounds less natural in English.

A more natural translation would be:

• The room has one hundred seats
• The room seats one hundred
• The hall has space for one hundred people

English usually prefers seats or a capacity expression here.