Question: In interstellar space, there is about one H2 molecule per cubic centimeter. The temperature of deep space is about 3 K. What is the pressure

In interstellar space, there is about one H2 molecule per cubic centimeter. The temperature of deep space is about 3 K. What is the pressure of this interstellar gas? How does this compare to the pressure of the best vacuum that can presently be attained in the laboratory («s 10~13 Pa)?

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