What is the molarity of a 0.30 liter solution containing 0.50 moles of NaCl?

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.

The excretory system,need answers for all: )

How can a mixture of salt water be separated into salt and water