Chem
posted by Anonymous .
Three bulbs are connected by tubing, and the tubing is evacuated. The volume of the tubing is 32.0 mL. The first bulb has a volume of 78.0 mL and contains 2.72 atm of argon, the second bulb has a volume of 250 mL and contains 2.83 atm of neon, and the third bulb has a volume of 37.0 mL and contains 8.24 atm of hydrogen. If the stopcocks (valves) that isolate all three bulbs are opened, what is the final pressure of the whole system in atm?
So I know that you have to use PV=PV, but how would you do it with three different bulbs? I mean, how would you get the volume of the whole system?
The following procedure provides a crude method of determining the molar mass of a volatile liquid. A liquid of mass 0.0171 g is introduced into a syringe and the end is capped (sealed). The syringe is transferred to a temperature bath maintained at 62.7 oC, and the liquid vaporizes. As the liquid vaporizes the plunger is pushed out. At equilibrium, the plunger reads 6.81 mL of gas. Atmospheric pressure is 740. mmHg. What is the approximate molar mass of the compound (in g/mol)?
Okay for this one I would us V/T=V/T, but why do they mention atmospheric pressure/how does it play into solving the problem?
Thanks in advance!

For #1, the volume of the entire system is volume bulb 1 + volume bulb 2 + volume bulb 3 + 32 mL (for the tubing).

To go further on #1, I would use PV = nRT and convert those volumes and pressures to mols = n. The add all the moles together and the volumes together and use PV = nRT to solve for P. You don't have a T but you can make up a T and keep it constant.
Respond to this Question
Similar Questions

Chemistry
An air thermometer can be constructed by using a glass bubble attached to a piece of smalldiamter glass tubing. The tubing contains a small amount of colored water that rises when the temperature increases and the trapped air expands. … 
chemistry
There is an apparatus that consists of three glass bulbs connected by small glass tubes with the stopcocks closed. Given that the temp. is 27 degrees C, what is the pressure of gas in each glass bulb? 
math
a man paid $8.50 for a small pump and 8 feet of tubing.he paid 12 times as much for the pump as for each foot of tubing.how much did the pump cost? 
Biology Diffusion
This is what i read from wikipedia: "Dialysis tubing is not permeable to glucose." Is that true? 
Biology
In each set up the dialysis tubing contains a solution of 30% glucose and safranin. However, the set ups differ in the contents of the beaker. The control set up has the same solution in the beaker while in the experimental set up … 
phsicsy
a liquid with density of 1.36*10^3 kg/m^3 through two horizontal sections of round tubing joined end to end. in first section, diameter of the tubing is 10cm and the flow speed is 230cm/s and the pressure is 1.3*10^5, the diameter … 
Chemistry
Bulb A is 100 mL and contains Helium at 1 atm. Bulb B is 500 mL and contains Argon at 2 atm. The bulbs are connected together by a valve. What is the pressure of gas A after the valves are opened? 
Chemistry
Bulb A is 100mL and contains Helium at 1atm. Bulb B is 500ml and contains Argon at 2atm The bulbs are connected together by a valve. (assume constant temperature). What is the total pressure of the system after the valves are opened? 
Chemistry
Bulb A is 100mL and contains Helium at 1atm. Bulb B is 500ml and contains Argon at 2atm The bulbs are connected together by a valve. (assume constant tempreature). What is the mole fraction of Argon in the opened system? 
Chem 125
Three bulbs are connected by tubing, and the tubing is evacuated. The volume of the tubing is 27.0 mL. The first bulb has a volume of 37.0 mL and contains 5.65 atm of argon, the second bulb has a volume of 250 mL and contains 2.16 …