Why during splitting of water not equal volume of oxygen and hydrogen gases were produced

Which of the following elements would you expect to have the lowest ionization energy value? fluorine, lithium, neon, nitrogen

When a beta particle is emitted, the mass number of the nucleus a. decreases by one b. increases by one c. remains the same d. decreases by two

Match each term to its description. match term definition excess reactant a) reactant that can produce a lesser amount of the product limiting reactant b) amount of product predicted to be produced by the given reactants theoretical yield c) reactant that can produce more of the product