If you start with a 24 mg sample how much remains after 18 hours?

Achemistry student weighs out of phosphoric acid , a triprotic acid, into a volumetric flask and dilutes to the mark with distilled water. he plans to titrate the acid with solution. calculate the volume of solution the student will need to add to reach the final equivalence point. round your answer to significant digits.

Which other elements contain the same number of outer electrons as sodium

In a reaction (at equilibrium) that makes more moles of gas than it consumes, what is the effect of increasing the pressure?