"mon prénom est" means "my first name is".
mon professeur est ... means my teacher is ...
Quel est votre prénom? means - what is your first name?
Où est mon pantalon means 'where are my trousers' in French.
a masculine noun. Quel est votre prenom
my name is
'Mon âme est perdue' means 'my soul is lost' in English.
"my heart is with my son"
"mon émission favorite est ..." means "my favorite (TV) show is ..."
Quel est mon mot de passe means "What is my password".
It means : What's the name of your wife, husband, boy/girlfriend ?
Mon sac est énorme means "my bag is enormous/huge" in French.
"Mon sac est cool, non ?" means "my bag is cool (nice), innit?" in French.