The ph of a solution is 4.8, what is the concentration of hydroxide ion in the solution ​

Noble gases are the most reactive elements on the periodic table. a. true b. false

Select the correct answer from each drop-down menu. in the process of nuclear fission, . fission only happens to very atoms. the fission process usually also produces several free .

Dona wrote the characteristics of two types of galaxies as shown below: type a: has a large flattened core type b: does not have a regular shape which statement is correct? type a is an irregular galaxy and type b is a lens galaxy. type a is a lens galaxy and type b is an irregular galaxy. type a is a spiral galaxy and type b is an elliptical galaxy. type a is an elliptical galaxy and type b is a spiral galaxy.