Question: Given the currently accepted value of the Hubble constant and the fact that the average matter density of the universe is one H atom/m 3

Given the currently accepted value of the Hubble constant and the fact that the average matter density of the universe is one H atom/m³, what creation rate of new H atoms would be necessary in a steady-state model to maintain the present mass density, even though the universe is expanding? (Give your answer in H atoms/m³per 10⁶ years.) Would you expect such a spontaneous creation rate to be readily observable?

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