Coding for the type of compound
2 marks · EasyA certain alkane has the name 'pentane'. Calculate the total number of hydrogen atoms in one molecule of pentane.
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12 (±0)
Common mistakes: Using formula for alkene or wrong number of carbons
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Marking points
M1 · 1 mark · Uses correct formula: number of H in alkane = 2n + 2, with n = 5.
A1 · 1 mark · Correct final answer: 12 hydrogen atoms.
Worked solution
So, one molecule of pentane has 12 hydrogen atoms.