Final answer:
To find the number of hydrogen atoms in a hydrocarbon with an empirical formula of CH2 and a molar mass of 112 g/mol, divide the molar mass by the empirical mass of CH2 (14.03 g/mol) to get a multiplier. Multiply the number of H in the empirical formula by this number to get the total number of hydrogen atoms, resulting in 16 hydrogen atoms.
Step-by-step explanation:
To calculate the number of hydrogen atoms present in a hydrocarbon with an empirical formula of CH2 and a molar mass of approximately 112 g/mol, we must first find the multiplier to convert from the empirical to the molecular formula. The empirical formula mass of CH2 is 12.01 g/mol for carbon plus 2(1.01 g/mol) for hydrogen, which equals 14.03 g/mol in total. By dividing the molar mass (112 g/mol) by the empirical formula mass (14.03 g/mol), we get a multiplier of approximately 8. Therefore, the molecular formula is C8H16, indicating that there are 16 hydrogen atoms in the molecule.