Confused about this alevel physics question (nuclear)

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turkeytown4
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#1
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#1
I got a similar answer to what the markscheme says, the markscheme gives 3.84Bq and i got 3.89Bq
What im confused about, though, is that in the markscheme it says that when calculating the number of moles present you have to do n = (1.23x10^-3)/87u
Why is the u included? Wouldnt it just be (1.23x10^-3)/87? In my textbooks ive never multiplied the molar mass by uName:  nuclear.png
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Last edited by turkeytown4; 4 weeks ago
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Ethanity007
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#2
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What u have calculated is the number of moles. What they have calculated is the number of molecules
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