Avogadro's Number Chemistry Example 4

Follow the full solution, then compare it with the other examples linked below.

Example 4

easy
How many atoms are in 0.500.50 mol of iron (Fe)?

Solution

  1. 1
    Atoms =0.50×6.022×1023= 0.50 \times 6.022 \times 10^{23}.
  2. 2
    =3.011×1023≈3.01×1023= 3.011 \times 10^{23} \approx 3.01 \times 10^{23} atoms.

Answer

3.01×1023 atoms3.01 \times 10^{23}\text{ atoms}
For monoatomic elements, the number of atoms equals the number of moles times Avogadro's number directly.

About Avogadro's Number

The defined number of particles in exactly one mole of any substance: 6.022×10236.022 \times 10^{23}.

Learn more about Avogadro's Number →

More Avogadro's Number Examples

Example 1 easy

How many molecules are in [formula] mol of [formula]?

Example 2 medium

How many individual oxygen atoms are in [formula] mol of [formula]?

Example 3 medium

How many molecules are in 2.5 moles of water ([formula])? How many individual atoms is that?

Example 5 medium

How many chloride ions are in [formula] mol of [formula]?

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Related Concepts

MoleMolar Mass