What volume (to the nearest 0.1 mL) of 5.20-M NaOH must be added to 0.400 L of 0.300-M HNO2 to prepare a pH - 3.90 buffer? 717 X mL

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Process Flow Diagram

A process flow diagram is a representation of various components, how they are arranged, and in what manner or sequence they work in correspondence to each other. It is a graphical way of representing a process.