# SCIENCE?CHEMISTRY***

how many dozens of dust particles are in 2.45 g if each particle has a mass of 2.51 x 10^-4 grams...?
I don't have a clue!!!!!!
Thanks Andy

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1. 2.45 g x (1 particle/2.51 x 10^-4 g) x (1 dz particles/12 particles) = about 813

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2. 2.45 g x (1 particle/2.51 x 10^-4 g) x (1 dz particles/12 particles) = about 813

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posted by messi

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