A large tank filled with a mixture of methane and air at 102 kPa and 25 ⁰C is connected to another large tank filled with a different composition of methane and air also at 102 kPa and 25 ⁰C. The connection between the tanks is a tube with an inner diameter of 50 mm and length of 150 mm. The concentration of methane in one tank is 90 mole percent and in the other, 5 mole percent. DETERMINE: molar density of methane (kmol/m³)? CHOICES: 0.4875 4.1695 0.4010 0.04115

10. A container is separated into two halves by a membrane. Your lab partner assistant, Thurmond, is supposed to place a MgCl2 solution on side 1 and a NaCl solution on side 2. He is then supposed to measure the rate of water movement across the membrane. Unfortunately, Thurmond is not very good about keeping complete lab notes and he has forgotten to write down some data and calculations. Using your knowledge of osmosis, complete the following table. Temperature is 15°C and the hydraulic conductivity for the membrane is 0.4 ml/atm sec. MgCl2 Concentration on Side 1 NaCl Concentration on Side 2 80 mM Osmolarity on Side 1 Osmolarity on Side 2 Difference in osmotic pressure 60 mosM across the membrane Jy 0.95 ml/sec Reflection coefficient (ơ) Direction of water movement

If you know pure nitrogen gas has a pressure of 1 atm, how many intensive degrees of freedom does your system have? choose the correct one. 1) 1 , 2) 0 , 3) 3,  4) 2

Experiment: determination of molar volume of gas at STP

The density of carbon tetrachloride (CC14) is used as a reference density at a specific condition to measure the specific gravity of the liquid substance Select one: O True O False

At a certain temperature and pressure, a 1.00 mol sample of argon gas is pumped into a 22.4 L rigid box that already contains 1.00 mol of nitrogen gas.  We would expect the argon gas to: Group of answer choices decrease the total gas pressure in the box by a factor of 2 occupy the entire 22.4 L volume of the box. increase the total gas pressure in the box by a factor of less than 2. spread out into the box, but the actual volume occupied but he gas cannot be known without pressure information. occupy only 11.2 L of the box.