A sample of polydifluoroethylene is determined to have an average molar mass of 4.8 x 10^4 g mol^-1 - HSC - SSCE Chemistry - Question 13 - 2019 - Paper 1
Question 13
A sample of polydifluoroethylene is determined to have an average molar mass of 4.8 x 10^4 g mol^-1.
Approximately how many carbon atoms are there in an average mol... show full transcript
Worked Solution & Example Answer:A sample of polydifluoroethylene is determined to have an average molar mass of 4.8 x 10^4 g mol^-1 - HSC - SSCE Chemistry - Question 13 - 2019 - Paper 1
Step 1
Calculate the Molar Mass of Carbon
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Answer
The molar mass of carbon (C) is approximately 12 g mol^-1.
Step 2
Determine the Number of Carbon Atoms
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Answer
To find the number of carbon atoms per molecule, divide the molar mass of the polymer by the molar mass of carbon:
extNumberofCarbonAtoms=Molar Mass of CarbonMolar Mass of Polymer=12g mol−14.8×104g mol−1=4000
Step 3
Choose the Correct Answer Option
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Answer
Based on the calculation, the approximate number of carbon atoms in an average molecule of polydifluoroethylene is 4000. Therefore, the correct answer is D. 4000.
