Answer:
C₅H₁₀.
Step-by-step explanation:
To determine the molecular formula of the compound, we need to know the molar mass of the compound. Since the empirical formula is CH₂, the empirical molar mass can be calculated as:
Empirical molar mass = 12.01 g/mol (atomic mass of C) + 2(1.01 g/mol) (atomic mass of H)
Empirical molar mass = 14.03 g/mol
The molecular mass of the compound is given as 70.15 g/mol. To find the molecular formula, we need to know how many empirical units are present in the molecule. This can be calculated by dividing the molecular mass by the empirical molar mass:
Number of empirical units = Molecular mass / Empirical molar mass
Number of empirical units = 70.15 g/mol / 14.03 g/mol
Number of empirical units = 5
This means that there are 5 empirical units (CH₂) present in the molecular formula of the compound. Therefore, the molecular formula is:
Molecular formula = 5(CH₂) = C₅H₁₀
Thus, the molecular formula of the compound is C₅H₁₀.