Question

How many grams do 5 2x 10^20 atoms of silicon weigh? In the units of g.​

Answer 1

g silicon = 0.0243 g

Step-by-step explanation:

• 1 mol ≡ 6.022 E23 atoms

∴ atoms silicon = 5.2 E20 atoms

⇒ n Silicon = (5.2 E20 atoms)×(mol/6.022 E23 atoms) = 8.635 E-4 mol silicon

∴ mm silicon = 28.086 g/mol

⇒ g silicon = (8.635 E-4 mol)×(28.086 g/mol) = 0.0243 g