How many moles of hydrogen atoms are present in 120 g of C6H12O6?

• A. 8.0 mol
• B. 8.0 mol
• C. 8.0 mol
• D. 4.0 mol

Answer: (B)

Verified step by step guidance

1. Identify the molecular formula of the compound, which is C6H12O6. This tells us that each molecule contains 12 hydrogen atoms.
2. Calculate the molar mass of C6H12O6 by summing the atomic masses of all atoms: 6 carbons, 12 hydrogens, and 6 oxygens. Use atomic masses approximately C = 12 g/mol, H = 1 g/mol, O = 16 g/mol.
3. Determine the number of moles of C6H12O6 in 120 g by dividing the given mass by the molar mass: \(\text{moles of C6H12O6} = \frac{120\ \text{g}}{\text{molar mass of C6H12O6}}\).
4. Calculate the total moles of hydrogen atoms by multiplying the moles of C6H12O6 by the number of hydrogen atoms per molecule: \(\text{moles of H atoms} = \text{moles of C6H12O6} \times 12\).
5. The result from the previous step gives the total moles of hydrogen atoms present in 120 g of C6H12O6.