11.207 dm3 of methane (CH4) at STP has_moles of hydrogen atoms:
Correct answer: C. 2
- A. 4
- B. 8
- C. 2
- D. 16
Explanation
The molar volume of a gas at STP is 22.4 dm3/mol.Given:Volume of methane (V) = 11.207 dm3Molar volume at STP (Vm) = 22.4 dm3/molUsing the formula:n = V / Vmn = 11.207 dm3 / 22.4 dm3/moln = 0.5 molThe number of moles of hydrogen atoms is equal to: 0.5 mol × 4 (hydrogen atoms per methane molecule) = 2 mol.Thus, the calculation demonstrates that 11.207 dm3 of methane at STP contains 2 moles of hydrogen atom.
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