✔ 最佳答案
a.
C contains the same number of atoms as 1 mole of Cu atoms if they have the same number of moles of atoms.
No. of moles of Cu = 1 mol
No.of moles of C = No. of moles of Cu = 1 mol
Mass of C = (molar mass) x mol = 12 x 1 = 12 g
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b.
C contains the same number of atoms as 2.5 moles of Mg atoms if they have the same number of moles of atoms.
No. of moles of Mg = 2.5 mol
No.of moles of C = No. of moles of Mg = 2.5 mol
Mass of C = (molar mass) x mol = 12 x 2.5 = 30 g
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c.
C contains the same number of atoms as 0.13 moles of Mg atoms if they have the same number of moles of atoms.
No. of moles of S = 0.13 mol
No.of moles of C = No. of moles of S = 0.13 mol
Mass of C = (molar mass) x mol = 12 x 0.13 = 1.56 g
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What are the relative masses for one atoms of carbon and magnesium?
Relative mass of one atom of C = 12
Relative mass of one atom of Mg = 24
