Someone please help me asap im really stressed

What is one difference between schools in spain and costa rica? a. the lunchtime for students b. the two class shifts available c. the time when school starts d. the school food menu choices

Tú / practicar / español todos los días correct verb tense? ?

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.