The recommended daily intake of zinc ions, Zn2+, expressed in moles, is 2.29 x 10-4 mol for adults. How many zinc ions (hint: particles) should an adult consume each day?

1.38 × 10²⁰ zinc ions

Explanation:

Step 1: Given data

Moles of Zn²⁺: 2.29 × 10⁻⁴ mol

Step 2: Convert 2.29 × 10⁻⁴ moles to ions

To convert moles to ions, we need a conversion factor: Avogadro's number. There are 6.02 × 10²³ Zn²⁺ ions in 1 mole of Zn²⁺ ions.

2.29 × 10⁻⁴ mol × 6.02 × 10²³ ions/1 mol = 1.38 × 10²⁰ ions

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