How many grams of magnesium contain 4.80 x 10^25 atoms of magnesium

Question

Nathalia Choi

Chemistry

26 February, 00:45

How many grams of magnesium contain 4.80 x 10^25 atoms of magnesium

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Answers (1)

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Georgia · Answer 1

mass Mg = 1.937 Kg

Explanation:

from periodic table for Mg:

⇒ molecular mass Mg = 24.305 g/mol

∴ mol ≡ 6.022 E23 atoms

⇒ mol Mg = (4.80 E25 atoms) * (mol/6.022 E23 atoms)

⇒ mol Mg = 79.708 mol

⇒ mass Mg = (79.708 mol) * (24.305 g/mol)

⇒ mass Mg = 1937.3 g

⇒ mass Mg = 1.937 Kg