VERSION 11) What pressure (in atm) will 044 moles of Co2exert in a 2.6 L contain
ID: 1043381 • Letter: V
Question
VERSION 11) What pressure (in atm) will 044 moles of Co2exert in a 2.6 L container at 25°C? A) 0.35 atm B) 4.1 atm C) 4.7 atm D) 8.6 atm E) 3.6 atm 12) Three identical flasks contain three different gases at standard temperature and pressure. Flask A contains CpH4, flask B contains 03, and flask C contains F2. Which flask contains the largest number of molecules? A) flask A B) flask B C) flask C D) All contain same number of molecules. 13) Which of the following samples will have the lowest pressure if they are all at the same temperature and in identical containers (same volume)? A) 15 g H2 B) 15 g Ar C) 15 g Kr D) 15 g CO2 E) All of these samples will have the same pressure. 14) A mixture of 0.220 moles CO, 0.350 moles N2 and 0.640 moles Ne has a total pressure of 2.95 atm. What is the partial pressure of CO? A) 1.86 atm B) 0.649 atm C)0.536 atm D) 1.54 atnm E) 0.955 atnm 15) An endothermic reaction causes the surroundings to A) warm up. B) become acidic. C) condense. D) decrease in temperature. E) release CO2. Page 3Explanation / Answer
11. using PV=NRT
P=(0.44X0.08206X298K)/2.6
P=4.1 atm
12. all the samples will have same number of molecules
13.all the molecules will have same pressure.
14. Total moles=0.220+0.350+0.640=1.21
partial pressure of CO=(0.220x2.95)/1.21
= 0.536atm
15. (D) decrease in temperature
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