Question

38 students need 88ml of acid how many 1l bottles are needed

Answer 1

 1 mL  = 1*10^-3 L

if every student needs 88 ml  the total ml needed are 3344ml

3344ml * 1*10^-3L/1ml= 3.344 L
that will mean you need 4 bottles or, 3 and 0.344 of another