To calculate the concentration in g/dm³, we need to divide the mass of the substance by its volume.
Given:
Mass = 7.2 g
Volume = 0.3 dm³
To calculate the concentration, divide the mass by the volume:
Concentration = Mass / Volume
Substituting the given values:
Concentration = 7.2 g / 0.3 dm³
To perform the calculation, we need to ensure that the units are consistent. Since 1 dm³ is equal to 1000 cm³, we can convert the volume from dm³ to cm³:
Concentration = 7.2 g / (0.3 dm³ * 1000 cm³/dm³)
Simplifying:
Concentration = 7.2 g / 300 cm³
Calculating:
Concentration = 0.024 g/cm³
Therefore, the concentration is 0.024 g/dm³.