Can you help me please I’m failing the class

Calcula la concentracion de hidronio en la lluvia ácida si el ph es 4.35

Las condiciones basicas que se deben tener en una narracion para catalogarla como un cuento son a.brevedad b.gran cantidad de personajes c.siempre son acontecimientos de tiempo pasado d.expocicion sencilla de los hechos

You have been chosen to be the guide of an exchange student from costa rica. before the student arrives in the us, he has asked you to give him some tips about schools in our country. using 10 different commands, create a presentation in which you give him tips for being successful in us schools. your presentation should include 5 affirmative and 5 negative commands in the tú form. examples: study many hours, don’t sleep in class, etc. to create your presentation, you may use powerpoint, or one of the tools listed in the web 2.0 tools area (contact your instructor if you need ).