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1mol Na in grams = 22.989770g
1mol Na atoms = 6.022 x 1023 atoms
1 x 1020 atoms Na x 1mol/6.022 x 1023 atoms x 22.989770g/mol = 0.004g Na (rounded to one significant figure)
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∙ 11y ago
The molar mass of Na is approximately 23 g/mol. To find the mass of 1x10^20 atoms of Na, you would first calculate the number of moles in 1x10^20 atoms using Avogadro's number, which is 6.022 x 10^23 atoms/mol. Then, multiply the number of moles by the molar mass to get the mass in grams.
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