An aqueous solution contains 0.30 M potassium fluoride.
One liter of this solution could be converted into a buffer by the addition of:.
(Assume that the volume remains constant as each substance is added.)
A. 0.15 mol NaOH
B. 0.30 mol HNO3
C. 0.29 mol HF
D. 0.29 mol KBr
E. 0.15 mol HNO3

Does anyone know a lot about how to: - calculate mass of magnesium metal - calculate the actual yield of magnesium oxide - calculate the theoretical yield of mgo - calculate the percent yield of mgo - determine the percent yield of mgo - determine the average percent yield of mgo i had to do an online lab and its asking these questions but i have no idea where to start or how to be able to find these things. i can post the chart of the data from the lab or if you can tell me exactly how i can find each.

In the particles are arranged in a regular, repeating pattern. a)a crystalline liquid b)a crystalline solid c)all gases d)all solids

What is the independent variable in this investigation? mass volume sample number substance density