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# Tutorial 4 Problems (no answer)

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School
Western University
Department
Chemistry
Course
Chemistry 1027A/B
Professor
Kay Calvin
Semester
Fall

Description
Chem 1100a Tutorial #4 Problems  1. C 2 2is converted into (C2H2 n. At 400 °C, 1.000 g of2(C2 n)  generates a pressure of 0.282 atm when it is placed in a 1500 mL flask. What is the value of n? d=m/v 26.022 (C2H2) d=0.666 OR n=PV/RT [.0666)(.0821)(673.15)]/.282 [(.282)(1.5)]/(.082)(673.15) =130.59/24.022 =130.65 n=5 2. Flask A has a volume of 2.00 L and contains SO 2at a pressure of 7.50 kPa. Flask B has a volume of 1.00 L and contains excess F  at an unknown pressure. Both flasks are at a 2 temperature of 300 K. When the stopcock separating the two flasks is opened, the reaction SO (g)  +  F (g)    SO F (g)  2 2 2 2 occurs completely, and the final pressure was found to be 7.50 kPa at 300 K. What was the  initial pressure of F  in flask B?  2 A:SO2 B:F2 C: SO2F2 f2 excess =1 L --> =3 L = 2 L P1V1=P2V2 =7.5 kPa =? kPa = 7.5 kPa P2 = [(7.5)(2.0)]/3.0 =300K =300K =300K
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