¿Cuántos moles están contenidos en cada una de las siguientes cantidades? 350 g de hierro
5,25 x 1020 átomos de Cu
1,25 x 1015 moléculas de NH3

Read each sentence carefully and select the option with the sentence written correctly. las chicas necesitan unas sandalias blancas. las chicas necesitan una sandalias blanca. las chicas necesitan unos sandalias blancos. las chicas necesitan un sandalias blanco.

Choose the word that can not complete the sentence. ir afuera. tengo que hay que tengo ganas de está lloviendo

Read and select the best answer. i am often asked, "why do some hispanic people use two last names? " well, in spanish a last name is not called a last name. in spanish, the last name is called an apellido. when you talk about someone's last name, you talk about their apellidos since there are two of them. the two apellidos are referred to as the first apellido and the second apellido. why are there two? well, my husband's first apellido is rodríguez, which is the first apellido (last name) of his father. his second apellido (last name) is pizano, which is the first apellido of his mom (this one is usually called the mother's maiden name in the us). his full name is francisco rodríguez pizano. below is his example: his dad's apellidos were: rodríguez abundis his mom's apellidos were: pizano lópez my husband's full name is: francisco rodríguez pizano