For the reaction A + 3B → 2C, how does the rate of disappearance of B compare to the rate of production of C?

Calculate the pH of a solution that contains 3.9 × 10-5 M H3O+ at 25°C.

Which of the following acids is the weakest? The acid is followed by its Ka value.

For the titration of 15.0 mL of 0.200 M HCl with 0.200 M NaOH. HCl(aq) + NaOH(aq) → NaCl(aq) + H2O(l) a) What is the initial pH? pH =  [a] b) What is the pH after the addition of 5.00 mL of NaOH ? pH =  [b] c) What is the pH after the addition of 15.0 mL of NaOH? pH =  [c] d) What is the pH after the addition of 20.0 mL of NaOH? pH =  [d]

Examine the following phase diagram and identify the feature represented by point B.

What is the vapor pressure of a solution prepared by dissolving 0.75 mol of nonvolatile and nonelectrolyte solute in 95 g of ethyl alcohol, C2H5OH ? (Poethyl alcohol= 50.0 torr at 25oC )

The reaction 2NO(g) + O2(g) → 2NO2(g) has the rate law: Rate = k[O2][NO]2 If the concentration of NO is doubled while the concentration of O2 is kept the same, the reaction rate will______

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 0.2668 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

For the reaction , 2HI(g) → H2(g) +  I2(g), the rate of change of HI is -0.45 M/s. What is the rate of appearance of I2 ?

Consider the following reaction, for which Kc = 0.0136 at 731 K 2HI(g) ⇌ H2(g) + I2(g) Which of the following statements is always true, regardless of the conditions (temperature, pressure, etc)?