"What is your address?"
Translation:¿Cuál es tu dirección?
The others are right when using 'que' for 'what' u practically expecting the definition or function of something explained, but when using 'cual' for 'what' its basically when u aske a person a queation of the what form and there is like a list of possible answersto choose from.
So what is the color of the shir you will where today would use cual and what is a shirt requires the use of que
Even though both "está" and "es" translate to "is" in English, "está" (conjugated form of "estar") is generally used for more temporary things like emotion, condition, etc. It is used for location also. However, when "estar" is used for location, it is used to describe an object's/person's temporary position in that particular moment. For example, "Mi mochila está en la cocina." (My backpack is in the kitchen) It could be in a different location tomorrow, right? When talking about something more permanent, like someone's mailing address, the verb "ser" should be used instead of "estar."
Cuál means 'Which' (as in which one?), and is usually the right word to use when followed by 'to be', as in ¿Cuál es la pregunta? Qué is used when immediately followed by the noun, as in ¿Qué pregunta tienes? Cuál es la pregunta. You asking basically what's the question.from: gramática Feb 8, 2015
«tuya» translate to the English "yours," the pronoun as in "This is yours." Notice that, since it is a pronoun, it does not have any noun near it. For example, you cannot say "Which is address yours?" which is what your Spanish sentence translates to; however, you can say "Which address is yours?" if you have a list of different addresses, which would be «¿Cuál dirección es la tuya?».