Step-by-step explanation:
To calculate the concentration of carbon dioxide in water in mol/L, we first need to determine the number of moles of carbon dioxide present in the given mass (0.145 g) at a given temperature and pressure.
The molar mass of CO2 is 44 g/mol, so the number of moles of CO2 in the 0.145 g sample is:
0.145 g CO2 / 44 g/mol CO2 = 0.003295 mol CO2
To convert to mol/L (or mol/dm^3), we divide the number of moles of CO2 by the volume of water present in the solution. Since the density of water at 25°C is close to 1 g/cm^3, we can assume that the volume of water present in the solution is 100 cm^3. Therefore, the concentration of CO2 in mol/L is:
0.003295 mol CO2 / 0.1 L = 0.03295 mol/L