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A bubble of kryptopn (Kr) gas is formed underwater. The bubble has a volume of 2.14x10^{-6}m^{3}and contains 1.70x10^{20}krypton molecules each of mass 1.39x10^{-25}kg. The pressure of the gas inside the bubble is 300kPa.

Calculate the relative molecular mass.

The attempt at a solution

When i looked in the markscheme of this paper, the answer was M_{r}=1.39x10^{-25}/1.66x10^{-27}as the answer. so does this mean to find the relative molecular mass i divide the mass by the unified mass unit?

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# Homework Help: Relative molecular mass using unified mass unit

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