El aparador del salón está lleno de libros, así que quizá el jarrón quede mejor sobre la cómoda.

Because de + el contracts to del in Spanish.

So:

• de el salón → del salón
• de la cómoda stays de la cómoda because de + la does not contract

This is a very common rule:

• el libro del profesor
• la puerta del coche
• el aparador del salón

The only common exception is when El is part of a proper name, such as de El Escorial.

In Spain Spanish, aparador usually means a piece of furniture such as a sideboard, buffet, or sometimes a display/storage cabinet placed in a dining room or living room.

It is not the same as cómoda:

• aparador = sideboard / cabinet
• cómoda = chest of drawers / dresser

So the sentence contrasts two different furniture items.

Because lleno describes a state or condition, so Spanish normally uses estar, not ser.

• está lleno de libros = it is full of books

This fits the usual distinction:

• ser = essential identity, what something is
• estar = state, condition, result

So:

• La mesa es grande = The table is big
• La mesa está llena de libros = The table is full of books

In Spanish, the normal pattern is lleno de + noun.

• lleno de agua
• lleno de gente
• lleno de libros

English often uses full of, and Spanish matches that structure with de.

Using con here would sound unnatural in standard Spanish.

Así que means so, therefore, or so then. It introduces a consequence or conclusion.

Here the logic is:

• The sideboard is full of books,
• so perhaps the vase would look better on the chest of drawers.

Other similar connectors are:

• por eso = for that reason / that’s why
• entonces = then / so
• de modo que = so / in such a way that

But así que is very natural in everyday speech.

Because quizá / quizás can trigger either the subjunctive or the indicative, depending on how certain or tentative the speaker feels.

Here:

• quizá el jarrón quede mejor...

uses the subjunctive to sound more tentative, like maybe it might look better.

You may also hear:

• quizá el jarrón queda mejor...

with the indicative, especially if the speaker feels more confident.

So both are possible, but the subjunctive often adds a softer, less certain tone.

Quedar has several meanings, and here it means something like:

• to look
• to suit
• to work
• to fit visually

So el jarrón quede mejor sobre la cómoda means the vase might look better or work better aesthetically on the chest of drawers.

This use of quedar is very common when talking about appearance or arrangement:

• Ese color te queda bien = That color suits you
• La lámpara queda mejor aquí = The lamp looks better here
• Así queda más bonito = It looks nicer this way

So it is not the basic stay/remain meaning here.

Because sobre means on / on top of, while en usually means in / inside / at / on, depending on context.

A vase would normally be placed on top of a chest of drawers, so:

• sobre la cómoda = on the dresser

If you said en la cómoda, it would usually suggest in the dresser, for example in a drawer.

You could also say:

• encima de la cómoda

which is also very natural and often more explicit for on top of.

Yes, cómodo / cómoda is also an adjective meaning comfortable, but here la cómoda is a noun meaning chest of drawers or dresser.

This is a good example of a word that can be either:

• an adjective: una silla cómoda = a comfortable chair
• a noun: la cómoda = the dresser

As a noun meaning furniture, it is feminine:

• la cómoda

You can only tell which meaning is intended from context.

Spanish uses definite articles (el, la, los, las) more often than English does.

In English, you might sometimes omit the, especially in more general descriptions, but Spanish often keeps it:

• El aparador del salón
• el jarrón
• la cómoda

This is normal because Spanish tends to mark nouns more explicitly with articles. In a sentence about specific objects in a room, using the articles sounds very natural.

Usually, yes. In Spain Spanish, salón commonly refers to the living room, lounge, or main sitting room.

Depending on the house and context, it can overlap with ideas like:

• living room
• sitting room
• lounge

In Latin America, other terms may be more common in some places, such as sala. But for Spain, salón is very normal.

Yes. Quizá (or quizás) is fairly flexible in position.

For example:

• Quizá el jarrón quede mejor sobre la cómoda.
• El jarrón quizá quede mejor sobre la cómoda.
• El jarrón quede quizá mejor sobre la cómoda. (less common stylistically)

The most natural positions are usually near the beginning or before the verb.

Also, quizá and quizás are both correct. The version without s is just a little more common in some contexts.

You often learn noun gender together with the article:

• el aparador
• el salón
• el jarrón
• la cómoda

A few helpful patterns:

• Nouns ending in -ón are often masculine: el salón, el jarrón
• Nouns ending in -dor are often masculine: el aparador
• Nouns ending in -a are often feminine: la cómoda

But these are only tendencies, not perfect rules, so it is best to memorize the noun with its article.

Because it agrees with el aparador, which is singular.

• El aparador está lleno de libros.

Even though libros is plural, lleno describes the sideboard, not the books.

Compare:

• El aparador está lleno = singular
• Los aparadores están llenos = plural

So adjective agreement follows the noun being described, not the noun after de.