Exam3Solutions_Chm130_OHmod

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Chemistry

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Apr 29, 2024

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Exam #3 Solutions CHM 130 1. What happens to the pressure of a gas if a) it is in a sealed container and its temperature decreases? The pressure decreases. b) half of it is removed from a container, and the temperature is kept the same? The pressure decreases (by the factor of 2) c) all of it placed in a container half the size of the original container while the temperature is kept constant? The pressure increases (by the factor of 2) d) an equal amount of a different gas is added to the container, while the original gas stays in the container and the temperature is kept constant? The pressure increases (by the factor of 2) 2. A sealed container contains a mixture of three gases: Ar, N 2 and Cl 2 . Partial pressure of Ar is 5.0 atm, partial pressure of N 2 is 3.0 atm, partial pressure of Cl 2 is 1.0 atm. What is the total pressure in this container? Total pressure equals sum of partial pressures. P tot = P Ar + P N2 + P Cl2 = 5.0 atm + 3.0 atm + 1.0 atm = 9.0 atm 3 . How many moles of gas are contained in 750.0 mL at 35.0°C and 530 mm Hg pressure? 4 . 0.305 moles of neon is contained in a 5.00 L flask at 53.0°C. What is the pressure in the flask? Do not forget to specify the units! 5 . Determine the volume of occupied by 2.5 moles of carbon dioxide at 15.0 o C and 3.7 atm. Do not forget to specify the units! 6. Convert the following line-angle (skeletal) structure shown below into a a) complete; b) condensed, and c) short-hand structure. d.) Name this compound and write its molecular formula. 1

Exam #3 Solutions CHM 130 d) Name : 2,3-dimethylheptane. Molecular formula : C 9 H 20 7. Give the structure corresponding to each IUPAC name: 2

Exam #3 Solutions CHM 130 3

Exam #3 Solutions CHM 130 8. Provide correct IUPAC names for the following compounds: 4

Exam #3 Solutions CHM 130 5

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