Le chiavi sono sul comò in camera.

Because chiave (key) is a feminine noun in Italian.

• singular: la chiave = the key
• plural: le chiavi = the keys

So le is the feminine plural form of the. Italian articles have to match the noun’s gender and number.

Because the subject is plural: le chiavi = the keys.

The verb is essere (to be), and its form changes depending on whether the subject is singular or plural:

• la chiave è = the key is
• le chiavi sono = the keys are

So sono is simply the correct plural form.

Sul means on the.

It is a contraction of:

• su = on
• il = the (masculine singular)

So:

• su + il = sul

This is very common in Italian. Similar combinations include:

• nel = in + il
• del = di + il
• al = a + il

Since comò is masculine singular, sul comò is the correct form.

Comò means dresser or chest of drawers.

The accent shows that the stress falls on the last syllable:

• co-MÒ

In Italian, when a word ending in a vowel is stressed on the final syllable, it normally gets a written accent. So the accent is mainly a pronunciation marker.

Also, comò is a masculine noun:

• il comò
• sul comò

It can mean either, depending on context, but in everyday Italian camera often means bedroom.

So in this sentence, in camera will usually be understood as in the bedroom or in the room, depending on the situation. Because a dresser is often in a bedroom, bedroom is a very natural interpretation here.

If Italians want to be more specific, they may say things like:

• camera da letto = bedroom
• soggiorno / salotto = living room

Both are possible, but they do not feel exactly the same.

• in camera is a common, simple way to say in the room / in the bedroom
• nella camera sounds more specifically like in the room or in that particular room

So in camera is a bit more general or idiomatic, while nella camera can sound more definite.

Italian often does this with places: sometimes the article is omitted after a preposition, especially in common location expressions. It is something you get used to by hearing many examples.

Yes. Italian word order is fairly flexible.

For example, you could also say:

• Le chiavi sono in camera, sul comò.
• In camera, le chiavi sono sul comò.

The original sentence, Le chiavi sono sul comò in camera, is natural because it gives the location in two layers:

1. sul comò = the more exact spot
2. in camera = the larger place

So it works like: They are on the dresser, in the bedroom.

Yes, often you can.

• sul comò = on the dresser
• sopra il comò = on top of / above the dresser

In many everyday situations, they mean almost the same thing. But there can be a slight nuance:

• sul comò usually means the keys are resting on its surface
• sopra il comò can also mean that, but it can sometimes sound a little more spatial, like above/on top of

For this sentence, sul comò is the most natural, compact choice.

Chiavi is pronounced roughly like KYAH-vee.

A few useful points:

• chi- sounds like kee, not like English ch
• -a- is an open ah
• -vi sounds like vee

So:

• chiave ≈ KYAH-veh
• chiavi ≈ KYAH-vee

This is because in Italian, ch before i or e gives a hard k sound.