135 mg of tungsten contains 4.43 × 10²⁰ atoms of tungsten (3.05 × 10⁻²² g/atom).
First, we will convert 135 mg to grams using the conversion factor 1 g = 1000 mg.
[tex]135 mg \times \frac{1g}{1000mg} = 0.135 g[/tex]
The mass of a single tungsten atom is 3.05 × 10⁻²² g. The number of atoms in 0.135 g of tungsten is:
[tex]0.135 g \times \frac{1atom}{3.05 \times 10^{-22}g } = 4.43 \times 10^{20}atom[/tex]
135 mg of tungsten contains 4.43 × 10²⁰ atoms of tungsten (3.05 × 10⁻²² g/atom).
You can learn more about unit conversion here: https://brainly.com/question/19420601
