It takes 75 ml of a 2.5 M HCl solution to neutralize 55 mL of a base of unknown concentration. calculate the concentration of an unknown basic solution.

Use the table to identify the phase and phase changes of the elements under the given conditions. write the name of the substance, phase, or phase change

Compare and contrast physical changes with chemical changes.

If a polyatomic ionic compound has gained two hydrogen ions, then how does its name begin?