Which statement best describes ph of pure water

What three things determine the shape and size of a puddle when water is poured out onto a surface

The diagram below shows a cell placed in a solution.a cell is shown placed inside a beaker. it is labeled cell. the solution inside the beaker is labeled 40% salt solution and the solution inside the cell is labeled 20% salt solution.only water is allowed to move in and out of the cell. what will most likely happen to the cell? it will expand as water moves out of it. it will shrink as water moves out of it.it will expand as water moves into it. it will shrink as water moves into it.

How many grams of magnesium metal will react completely with 8.3 liters of 5.5m hcl? show all work