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What mass of sodium metal contains the same number of atoms as 12.00g of carbon?
Wiki User
∙ 11y ago
23 g
The masses in your table represent the relative masses of the atoms of these elements. According to the table an average atom of sodium is 23/12 = 1.9 times as massive as an average atom of carbon. Thus, in order to have the same number of atoms of sodium we need a mass of carbon that is 23/12 times its mass. Since we have 12 g of carbon, we have 23/12 x 12 = 23 g sodium.
Wiki User
∙ 11y ago
To find the mass of sodium containing the same number of atoms as 12.00g of carbon, you need to use Avogadro's number and the molar masses of carbon and sodium. The Atomic Mass of carbon is 12.01 g/mol, and the atomic mass of sodium is 22.99 g/mol. Since atoms are counted in moles, calculate the number of moles of carbon in 12.00g (12.00g/12.01 g/mol), then equate this to the number of moles of sodium to find the mass of sodium. The mass of sodium that contains the same number of atoms as 12.00g of carbon is approximately 16.38g.
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