You can determine the concentration of acids or bases in a solution by

a. the ph scale
b. a salt
c. the periodic table of elements

When will le chatelier's principle come into effect? at the beginning of a reaction, when there are only reactants when a reaction has reached chemical equilibrium when a catalyst is added to a reaction mixture when a reaction is occurring but not yet at equilibrium

How many grams of mgbr2 are needed to produce 75g or metal?

How many grams of sodium chloride are in 250ml of a 2.5m naci solution