This is what I have so far but I\'m stick after that. Please help. Thanks (2 poi

Question

This is what I have so far but I'm stick after that. Please help. Thanks

(2 points. Compound A gives 79.37% C and 888% H by elemental analysis and gives a molecular ion peak of 136 on low resolution mass spec. What is the molecular formula? Answer 8.68% H 85.25 11.75 othes 2 .75 s 1.775 (2 points) 2. What is the Degree of Unsaturation for Compound A? Answer: 3 (2 points) 3. Based on your answer to Question 3, can Compound A be aromatic? (Yes Answer: or No) (2 points) 3. Compound A is reacted with CrO, in H SO, to give Compound B. Answer: Compound B gives a molecular ion peak of 134 on low resolution mass spec. What is the Molecular Formula for Compound B? 2 points) What is the functional group in Compound A? Be specific! Meaning tell me ia t Answer s primary. secondary or tertiary.

Explanation / Answer

C - 79.37 / 12 = 6.614 mol

H - 8.88/1.008 = 8.810 mol

C:H molar ratio = 0.75

Therefore, the emperical formula is (C3H4X). Mass spec. results 136. C3H4 molar mass = 40 and 3x40 = 120 and molar mass of O is 16. 120 + 16 = 136.

Thus, the Molecular formula is likely C9H12O

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