1. Calculate the volume:

* Area: 10.0 cm * 5.0 cm = 50.0 cm²

* Thickness: 0.0018 cm

* Volume: 50.0 cm² * 0.0018 cm = 0.09 cm³

2. Convert volume to cubic meters:

* 1 cm³ = 1 x 10⁻⁶ m³

* 0.09 cm³ * (1 x 10⁻⁶ m³/cm³) = 9 x 10⁻⁸ m³

3. Use the density of aluminum:

* Density of aluminum: 2700 kg/m³

4. Calculate the mass:

* Mass = Density x Volume

* Mass = 2700 kg/m³ * 9 x 10⁻⁸ m³ = 0.000243 kg

5. Convert to grams:

* 0.000243 kg * 1000 g/kg = 0.243 g

Therefore, the mass of the aluminum foil is approximately 0.243 grams.