it's feminine
It depends on the particular word you use, but the general word "canción" is feminine (i.e. "la canción").
Au concert. - masculine = au - feminine = à la
No, "piano" is not plural. "Piano" is the singular form, and "pianos" is the plural form
The genitive singular of all English nouns is formed by adding -'s: piano's
Un piano (masculine noun)
Feminine
its masculine no doubt
Masculine
masculine
feminine
Feminine.
La pizarra is feminine, (el) is masculine, and (la) is feminine.
Une école feminine
it is masculine so El
directeur → masculine directrice→ feminine
feminine