Mauricio se miró al antes de salir. despertador baño espejo ropero

The teacher didn't explain this at all and i don't understand this

Hola, mario: yo (1) (estar) en la universidad. la clase de anatomía (2) (ser) de cinco a siete. mi hermano y su esposa (3) (venir) a cenar esta noche. a las siete (yo) (4) (blank) (correr) al supermercado (grocery store). tú (5) (blank) (tener) que regresar a casa antes de las siete. hasta pronto. gracias, valeria

Astudent requires 2.00 l of 0.100 m nh4no3 from a 1.75 m nh4no3 stock solution. what is the correct way to get thesolution? use m; v; = m.ve1o measure 114 ml of the 1.75 m solution, and dilute it to 1.00 l.measure 114 ml of the 1.75 m solution, and dilute it to 2.00 l.measure 8.75 ml of the 1.75 m solution, and dilute it to 2.00 l.o measure 8.75 ml of the 0.100 m solution, and dilute it to 2.00 l.