In the van der Waals equation of state, the constant b represents the amount of "unavailable volume" occupied by the molecules themselves. Thus V is replaced by (V-nb), where n is the number of moles. For hydrogen, b is about 2.7×10 m³/mol. Part A Estimate the diameter of a hydrogen molecule. Express your answer to two significant figures and include the appropriate units. d= Value Submit HÅ Provide Feedback Request Answer Units www. ?

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Units and Dimensions

These are generally defined as the terms which precede or describes the dimensions further. These are also further divided into two parts namely fundamental units and the derived units.