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The element zinc

If Zinc was designed to have an atomic mass of 100.0amu, what would the atomic mass of Si be?

In any physical problem the units we use a just a way of labelling fixed properties of a material. So if you rescale your units then the ratio of two quantities doesn't change at all. So you could use the equation [new mass of Si] = ([old mass of Si] divided by [old mass of zinc]) times [mass of zinc in the new units]. Or [mass of Si in new units] = 28.086*100/65.38 = about 43 "new mass units".
24 October 2012
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