Ascientist observes that after mixing a solid powder into water, the ph of the newly formed solution is 2.7. what can he infer from this observation?
the solution contains an indicator that has a ph of 2.7.
the solid powder contained hydrogen ions.
the ph indicator was used incorrectly.
the powder increased the hydrogen ion concentration of the solution.

The diagrams to the right show the distribution and arrangement of gas particles in two different containers. according to kinetic-molecular theory, which of the following statements is true? check all that apply. if the temperatures of both containers are equal, container a has greater pressure than container b. if the volume of container a decreased, its pressure would decrease. if the pressure in both containers is equal, container a has a lower temperature than container b.