How many atoms of hydrogen are present in 5.29 × 10^{21} molecules of ethanol (C_2H_5OH)?

• A. 1.06 × 10^{22}
• B. 2.65 × 10^{22}
• C. 5.29 × 10^{21}
• D. 3.70 × 10^{22}

Answer: (D)

Verified step by step guidance

1. Identify the molecular formula of ethanol, which is C\_2H\_5OH. This means each molecule contains 2 carbon atoms, 6 hydrogen atoms (5 from H\_5 and 1 from OH), and 1 oxygen atom.
2. Determine the number of hydrogen atoms per molecule of ethanol. Since there are 5 hydrogen atoms in the H\_5 group and 1 hydrogen atom in the OH group, the total hydrogen atoms per molecule is 6.
3. Use the given number of ethanol molecules, which is 5.29 \times 10^{21}, and multiply it by the number of hydrogen atoms per molecule to find the total hydrogen atoms.
4. Set up the calculation as: Total hydrogen atoms = (Number of ethanol molecules) \times (Hydrogen atoms per molecule) = 5.29 \times 10^{21} \times 6.
5. Perform the multiplication to find the total number of hydrogen atoms present in the sample of ethanol molecules.