please answer the questions you DO NOT need to explain 11, which of the followin

Question

please answer the questions

you DO NOT need to explain

11, which of the following is molecular and a compound? A. Co CO D, KBr E. Ar 12. What is the molar mass of PCIs? A, 677.48 g/mo B, 208.22 g/mol C. 208.22 amu/mol D. 332.10 g/mol E. 66.42 g/mol 13. How many o atoms are there in 2 molecules of C 3CH3 A. 6 B. 4 C. 2 D, 12 E, 3 14. An oxide of chlorine is 38.76% by mass chlorine and 61.24% by mass oxygen. What is its empirical formula? A. Clos B. Cio C. Cl207 D. Cio E. Cio 5. A molecule has an empirical formula CF and a molar mass between 180 and 190 g/mol. Wha is molecular formula? A, CF B, c6F6 C, CF6 D. CoF E. C5F5

Explanation / Answer

11. B. CO is a compound
12. Molarmas of PCl5 = 31+5*35.5
= 208.5 g/mol

answer is B

13. d. 12
14. cl = 38.7/35.5 = 1
O= 61.24/16 = 3.8275

answer = d. ClO4

15. B. C6F6

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