How many subject pronouns do they have in Spanish

Uando llegamos al mercado ese día (1) mucha actividad: un vendedor de fruta (2) mangos y plátanos. una artesana (3) sus tejidos (weavings) de alpaca. muchos niños (4) en la plaza. de repente, (5) algunas nubes muy oscuras y el cielo (6) muy gris. luego (7) a llover y el viento (8) (blew) violentamente. cuando vino la lluvia, los niños (9) a sus casas. los vendedores (10) sus puestos (stalls) y los artesanos (11) (covered) sus artículos. la tempestad (12) media hora y después, todo (13) como antes

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

Proyecto: ¡a conversar! this project serves two purposes: to practice using spanish vocabulary that deals with shopping and bargaining to practice describing or giving information in spanish in writing remember, when you're asked to write in spanish, if you know a spanish-speaker, possibly a native speaker, it's to have that person read what you wrote and you make corrections and maybe give you a few ideas on how you can improve your writing skills in spanish. use the spanish vocabulary in this project to you with the conversation you'll write.