A compound has the following skeletal formula - VCE - SSCE Chemistry - Question 3 - 2019 - Paper 1
Question 3
A compound has the following skeletal formula.
The molar mass of the compound is
A. 71 g mol⁻¹
B. 74 g mol⁻¹
C. 85 g mol⁻¹
D. 86 g mol⁻¹
Worked Solution & Example Answer:A compound has the following skeletal formula - VCE - SSCE Chemistry - Question 3 - 2019 - Paper 1
Step 1
Identify the skeletal formula components
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Answer
The skeletal formula represents a structure with two carbon atoms (as implied by the two line ends), one oxygen atom, and appropriate hydrogen atoms to satisfy the valency of each carbon.
Step 2
Calculate the molar mass
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Answer
Count the atoms:
Carbon (C): 2
Hydrogen (H): 4
Oxygen (O): 1
Use the atomic masses:
C: approximately 12 g/mol
H: approximately 1 g/mol
O: approximately 16 g/mol
Calculate total molar mass:
Molar Mass = (2 × 12) + (4 × 1) + (1 × 16)
Molar Mass = 24 + 4 + 16 = 44 g/mol.
Step 3
Choose the correct answer
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Answer
Since none of the provided options match the calculated molar mass, no answer can be selected. However, the closest logical reasoning based on structural assumptions would lead to option D, 86 g/mol, if additional functional groups were considered.
