Which 3 letters are not used very often at the beginning of a word in Spanish?

¿cómo se llama el objeto que sirve para colgar la ropa?

Achemist mixes 4 liters of one acid solution with 10 liters of a 40% solution, resulting in a 30% acid solution. what is the value of x, the acid concentration of the first solution

Which of the sentences below rewrites the following words as a negative ud.command that uses double object pronouns