#6 S https://session.masteringchemistry.com/myct/itemView2offset-next&assignment
ID: 956795 • Letter: #
Question
#6 S https://session.masteringchemistry.com/myct/itemView2offset-next&assignmentProblemID-59850512; Copy of General Chemistry Fall 2015 Signed in as Tu Problem 10.37 Part A Calculate the number of molecules in a deep breath of air whose volume is 2.20 L at body temperature, 37 °C, and a pressure of 740 torr molecules Submit Part B The adult blue whale has a lung capacity of 5.0 × 1031 Calculate the mass of ar (assume an average molar mass 28 98 g/mol) corta ed in an ad at 02 °C and 1 00 atm , assuming the air behaves ideally Express your answer using two significant figures.Explanation / Answer
1.
apply ideal gas law
PV= nRT
n = PV/(RT)
P = 740 mm Hg = 740/760 = 0.973 atm
T= 37+273 = 310
n =0.973*(2.2)/(0.082*(310)) = 0.0842 mol
1 mol = 6.02"*10^23
then
0.0842 mol --> 0.0842*6.022*10^23 = 5.0705*10^22 molecules
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.