How to find valency of an element

If 10.g of agno3 is available, what volume of 0.25 m agno3 can be prepared

What happens to the temperature of a substance when the average kinetic energy of its particles increases?

The characteristics of two different types of reactions are shown below: reaction a: electrons are gained by the atoms of an element. reaction b: protons are lost by the atom of an element. which statement is true about the atoms of the elements that participate in the two reactions? their identity changes in both reaction a and reaction b. their identity changes in reaction a but not in reaction b. their identity changes in reaction b but not in reaction a. their identity remains the same in both reaction a and reaction b.