Question

What is the unit of rate of reaction

Answer 1

The units of a reaction rate are concentration / time. This is most often M / s, where M is molarity (moles per liter) and s is time in seconds.

P.S. Don’t get M / s (molarity per second) confused with m / s (meters per second)

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Answer 2

This is the unit for rate of reaction: mol dm-3-s-1