A pinça está na tábua de corte.

Because pinça is a feminine noun in Portuguese, so it takes the feminine singular article a.

• a pinça = the tweezers / the tongs / the forceps
• o is used with masculine nouns

Grammatical gender in Portuguese does not always match biological sex or logic. You usually have to learn each noun together with its article.

Portuguese has two main verbs for to be: ser and estar.

Here, está is used because it describes location:

• A pinça está na tábua de corte. = The tweezers are on the cutting board.

In Portuguese, location is normally expressed with estar, not ser.

Compare:

• Ela está na cozinha. = She is in the kitchen.
• Ela é médica. = She is a doctor.

So está is the correct choice because the sentence tells you where the object is.

Na is a contraction of:

• em = in / on / at
• a = the

So:

• em + a = na

That means na tábua de corte literally comes from in/on the cutting board.

Other common contractions:

• em + o = no
• em + os = nos
• em + as = nas

Because em is a very flexible preposition in Portuguese. Depending on context, it can mean:

• in
• on
• at

So in this sentence, na tábua de corte is naturally understood as on the cutting board, not in the cutting board.

Portuguese often uses em where English makes a more specific distinction.

This is a noun phrase:

• tábua = board / plank
• de = of / for
• corte = cutting / cut

So tábua de corte literally means something like board for cutting or board of cutting, which English naturally expresses as cutting board.

This pattern is very common in Portuguese:

• escova de dentes = toothbrush
• máquina de lavar = washing machine
• copo de vidro = glass cup / cup made of glass

Yes, you may hear both, depending on region and context.

Common possibilities include:

• tábua de corte
• tábua de cortar
• tábua de cozinha in some contexts
• tábua de carne for a meat-cutting board in some cases

All are understandable, but tábua de corte is a natural phrase and works well.

The accents help show pronunciation and sometimes distinguish words.

• está has an acute accent on á, showing the stressed syllable: es-TÁ
• tábua has an acute accent on tá, showing the stress: TÁ-bua

Without getting too deep into spelling rules, the accents tell you where the word is stressed, which is very useful for learners.

In Brazilian Portuguese:

• pinça sounds roughly like PEEN-sa or PEEN-suh
• the ç is pronounced like s

Important points:

• ç never sounds like k
• pin is nasalized a bit in Portuguese, so it is not exactly like English peen, but that approximation helps
• the stress is on the first syllable: PIN-ça

So:

• pinça ≈ PEEN-sa

Because this is the normal Portuguese sentence order:

• Subject + verb + place
• A pinça
  • está
    • na tábua de corte

This is very similar to English:

• The tweezers are on the cutting board.

Portuguese can sometimes move things around for emphasis, but this version is the most neutral and natural.

Yes. Portuguese and English do not always divide objects the same way.

For example:

• a tesoura = the scissors
• a pinça = the tweezers / the forceps / the tongs, depending on context

Even if English prefers a plural form, Portuguese may use a singular noun. So you should learn the Portuguese word as its own unit, rather than expecting it to match English number exactly.

Usually, no. In a normal sentence, Portuguese generally wants the definite article here:

• A pinça está na tábua de corte.

Leaving out a would sound unnatural in most ordinary contexts. Portuguese uses articles more often than English does, especially with common nouns.

The plural would be:

• As pinças estão nas tábuas de corte.

Changes:

• a → as
• pinça → pinças
• está → estão
• na → nas
• tábua → tábuas

If you only want the tweezers are on the cutting board, keeping cutting board singular, you would say:

• As pinças estão na tábua de corte.