June 2018 Chemistry Regents #63-65

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Question 63-65

 

 

Base your answers to questions 63 through 65 on the information below and on your knowledge of chemistry.

The diagram below represents a cylinder with a moveable piston containing 16.0 g of O2(g). At 298 K and 0.500 atm, the O2(g) has a volume of 24.5 liters.

63 Determine the number of moles of O2(g) in the cylinder. The gram-formula mass of O2(g) is 32.0 g/mol. [1]

Answer-->    0.500mol

64 State the changes in both pressure and temperature of the gas in the cylinder that would increase the frequency of collisions between the O2(g) molecules. [1]

Answer--> Change in pressure: increases.  Change in temperature: higher

65 Show a numerical setup for calculating the volume of O2(g) in the cylinder at 265 K and 1.00 atm. [1]

Answer--> V= (24.5 *265*0.500)/(298*1.00)

on to Questions 66-69

 

 

Questions 1-5 Questions 6-10 Questions 11-15 Questions 16-20 Questions 21-25 Questions 26-30 Questions 31-35 Questions 36-40 Questions 41-45 Questions 46-50

Questions 51-53 Questions 54-56 Questions 57-59 Questions 60-62 Questions 63-65 Questions 66-69 Questions 70-73 Questions 74-76  Questions 77-79  Questions 80-82  Questions 83-85 

 

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