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How many atoms are there in 90.2 grams of selenium?
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How many atoms are there in 90.2 grams of selenium?
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Jan 18, 2015
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How many atoms are there in 90.2 grams of selenium?
Chemistry
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Zach Tuttle
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First calculate the moles of selenium by multiplying the mass x molar mass
90.2 × 78.96 = 7122.2 moles
Number of moles multiplied by avogadros number gives number of atoms
7122.2 × 6.022 × 10^{23} = 4.289×10^{27} atoms
Gandhi Mena
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Jan 23, 2015
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Gandhi Mena
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