Final answer:
The molar mass of CHCl is 48.47 g/mol. By comparing the molar mass of the empirical formula to the given molar mass of the compound, we can determine the molecular formula. The compound's molecular formula is C₄H₄Cl₄.
Step-by-step explanation:
The molar mass of CHCl is calculated by adding the atomic masses of each element. The atomic mass of carbon (C) is 12.01 g/mol, the atomic mass of hydrogen (H) is 1.01 g/mol, and the atomic mass of chlorine (Cl) is 35.45 g/mol. Therefore, the molar mass of CHCl is 12.01 g/mol + 1.01 g/mol + 35.45 g/mol = 48.47 g/mol.
To determine the molecular formula, we need to compare the molar mass of the empirical formula (CHCl) to the given molar mass of the compound (1.20 g). The ratio between the two molar masses is obtained by dividing the given molar mass by the molar mass of the empirical formula: 1.20 g / 48.47 g/mol = 0.0247 mol.
The empirical formula has 2 carbon atoms, 2 hydrogen atoms, and 2 chlorine atoms (C₂H₂Cl₂). To get the molecular formula, we need to multiply these subscripts by the ratio obtained: C₂H₂Cl₂ * 0.0247 = 0.0494 mol.
Therefore, the molecular formula of the compound is C₄H₄Cl₄, which corresponds to option c).