How many moles and atoms of sodium are in the recommended daily allowance?

0.0152 mol; 5.24 x 10^22 atoms

The RDA for sodium is 2300 mg or 2.3 g.

a)Moles of Na

The molar mass of Na is 22.99 g/mol.

Moles of Na = 2.00 g Na × (1 mol Na/22.99 g Na) = 0.0870 mol Na

b)Atoms of Na

Atoms of Na = 0.0870 mol Na x (6.022 × 10^23 atoms Na/1 mol Na)

= 5.24 x 10^22 atoms Na

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