Calculate the pH of a 0.25 M nitrous acid (HNO2) solution. [ Ka = 4.5 x A. 1.97 B. 3.95 C. 0.011 D. 1.37 E. 12.03 4.6x10

2. Consider the P-x-y diagram at 300 K for A-B mixtures at right. (a) What are the vapor pressures of A and B at 300 K? (b) A 25 mol-% A vapor mixture is isother- mally compressed from 1.5 to 2.0 bar. Does a 2-phase mixture form, and if so, what is the mole fraction of A in each resulting phase? (c) Using data at the azeotrope, compute the van Laar parameters a and 3 for A-B mix- tures at this temperature. P (bar) 2.8 2.6 2.4 2.2 2.0 1.8 1.6 1.4 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 XA or YA

Consider the following samples of gas.Select the set of graphs below that show the distributions of the speed of the atoms in each sample (please take a photo of the correct graph).

2. Find the boiling pressure of acetone (mmHg) at 45 °C using: (b) AHap from Problem 1 (you may also assume that ZV-ZL ~ 1). -, Antoine equation, log10 pat = A- B T+C where Pat is in mmHg and T is in °C. For acetone between -13 and 55 °C: A = 7.11714, B = 1210.6, and C=229.66. (c) ( > "Shortcut" equation log10 Pat a² = (1 + w) (1 - // ) For acetone: T=508.2 K, P = 4.701 MPa, w=0.306.

The partial molar enthalpy of component (1) in a binary mixture at a stant temperature and pressure is given as H₂ = x₂ − x₁ +4, (2.1) ere x₁ and x₂ are the mole fraction of components (1) and (2) in the mixture. If the molar halpy of component (1) in a pure case is H₁ = 20 kJ/mol. Determine (10 points) the partial molar enthalpy of component (2). (10 points) molar enthalpy of the mixture. C

13 An ideal solution of 5.25 moles of benzene and 3.0 moles of toluene is placed in a piston and cylinder assembly. At 298 K, the vapor pressure of pure substances are P°(benzene) = 96.4 torr & P°(toluene) = 28.9 torr. The vapor pressure of the solution is; 69.81 torr O 71.83 torr 53.47 torr O 66.61 torr 67.50 torr

molar mass of ethanol: 46.094w = 0.645Tc = 513.9 KVc = 167cm^3/molTn = 351.4 K a.) Calculate the molar volume V (in cm3/mol) and compressibility factor Z of saturated liquid ethanol at T = 368 K.b.) Calculate the molar volume V (in cm3/mol) and compressibility factor Z of saturated vapor ethanol at T = 368 K.c.) Calculate the molar volume and compressibility factor Z of ethanol vapor at T = 462.5 K and P = 24.6 bar.

can u please re-do with these constants thanks