Final answer:
To calculate the molarity, we must know the molecular mass of the organic compound to determine the number of moles, which is then divided by the volume of the solution. Without the molecular mass, the molarity cannot be accurately calculated.
Step-by-step explanation:
The question is asking to calculate the molarity of a solution given that there are 18 grams of an organic compound dissolved in 1 liter of solution. The molarity of a solution is defined as the number of moles of solute per liter of solution. To find the molarity, we must know the molecular weight of the organic compound in question. If the molecular weight is given, the number of moles of the compound can be calculated by dividing the mass of the compound by its molecular weight. After obtaining the moles, we can use the molarity formula:
Molarity (M) = Moles of solute / Volume of solution in liters
Without the molecular weight of the compound, the molarity cannot be accurately calculated. Assuming the molecular weight is provided and enables us to find that the number of moles corresponds to a 0.4M solution, then that would be the correct molarity. Remember, the exact molarity can only be determined if the molecular weight of the organic compound is known.