How did you get the [H+] = 0.00715m What is the pH of a 0.40 M H2Se solution that has the stepwise dissociation constants Ka1 =1.4x10-4 and Ka2 = 1.0x10-11

What is important to study for nios grade 12 chemistry? i have only one month left.

Do polar molecules have ionic bonds?

The diagin dilutepage 6 of 12a6a5(a)fluorine, chlorine, bromine and iodine are placed in the same group of theperiodic table.state the common name used to describe elements in this group.(i)state the group in which the elements are placed and explain whythey are placed in that group.(ii)which of the above named elements is a solid at roomtemperature and pressure?