The volume of air is 0.300 mL at 2.0 °C, when the barometric pressure in the room is 745.0 torr, then how many moles of air are in the U-tube? R = 6.237 x 10⁴ mL ^. torr ^.
mol^-1. K^-1??

a. 7.43 x 10^-8 moles

b. 6.75 x 10^-3 moles

c. 4.50 x 10^-1 moles

d. 1.30 x 10^-5 moles

From your data in Part 1 of the experiment, you calculate the natural log of the partial pressure of water and 1/T value in K for 5 points between 50°C and 80°C. You make a graph of ln(P) vs. 1/T and determine that the slope of the linear line is       -4800 K. Use this information to calculate ΔHvap of water. Make sure to use R = 8.314 J .n
n
a.n39.9 kJ/moln
b.n46.6 kJ/moln
c.n31.5 kJ/moln
d.n0.578 kJ/mol