Which state (s) of mattter have no definite shape or volume

Which is the layer underground where all empty spaces are filled with a combination of air and water ?

For each of the following types of reactions, write a general reaction formula in the symbolic form—for example, a + b → ab. single-displacement double-displacement synthesis decomposition

What is the number of moles of chemical units represented by 9.03x10^24? and how do i show work? (dumb it down )