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Consider the following equilibrium: CO(g) + H2O(g) ⇌ H2(g) + CO2(g)   Kc = 16 Suppose that 1.50 mol of CO  and 1.50 mol of H2O are placed in 0.500 L flask and allowed to come to equilibrium at high temperature. A) Calculate the equilibrium concentration of CO2(g) [a] mol/L B) Calculate the equilibrium concentration of H2O (g) [b] mol/L C) Calculate the equilibrium concentration of H2(g) [c] mol/L D) Calculate the equilibrium concentration of CO (g) [d] mol/L

Calculate the pH of a buffer containing 3.50 M formic acid, HCOOH (Ka = 1.8 × 10-4) and 1.25 M sodium formate, HCOONa.You must show all of your work for credit.

1. Select the strongest acid from the following: A) HClO or HClO2 [a] B) HI or HBr [b] 2. Select the strongest base from the following: C) NO2- or NO3- [c] 3. Which will be more soluble in an acidic solution? D) CuCO3 or CuBr2 [d]

Which of the following is true for a chemical reaction at equilibrium?

A zero-order reaction A → B, has a rate constant of 0.725 M. s-1. How many seconds will it take for the concentration of A to decrease from 2.00 M to 1.25 M?

A 1.00 L of an aqueous solution contains 1.25 g of a nonionic solute. If the osmotic pressure of this solution at 25 oC is 0.3207 atm. 1) Calculate the molarity of the solution. [A] mol/L 2) Calculate the moles of the nonionic solute in the solution. [B] mol 3) Calcullate the molar mass of the nonionic solute. [C] g/mol

Select the strongest intermolecular force in each of the following. 1) Br2 – [a] 2) CH4 – [b] 3) NH3 – [c] 4) BF3 – [d] 5) CH3Cl – [e]

The vapor pressure of a liquid is 47.1 kPa at 501 K and 10.5 kPa at 489 K. What is the enthalpy of vaporization of the liquid ? You must show all of your work including units for credit.

Consider the following reaction: 2HI(g) → H2(g) + I2(g) If the initial concentration of HI was 0.350 M and the concentration of HI was 0.025 M after 0.100 s, what is the rate of the reaction?

Octane has a vapor pressure of 40. torr at 318.3 K  and 400. torr at 377.2 K. What is its heat of vaporization? You must show all of your work including units for credit.