Cu1+ and O2- what is the formula and what is the name of it

Calculate the mass of silver needed to react with chlorine to produce 126g if silver chloride?

If i add water to oil what will happen

A2.5% (by mass) solution concentration signifies that there is a 2.5 % (by mass) solution concentration signifies that there is blank of solute in every 100 g of solution. of solute in every 100 g of solution