Martin P.

Compute the root-mean-square speed of Ar molecules in a sample of argon gas at a temperature of 61°C. m... more

A 975.0 mL sample of 0.18 M HClO4 is titrated with 0.54 M KOH. Determine the pH of the solution after the addition of 325.0 mL of KOH.

What is the pH of a solution prepared by mixing 50.00 mL of 0.10 M NH3 with 10.00 mL of 0.10 M NH4Cl? Assume that the volume of the solutions are additive and that Kb = 1.8 × 10-5 for NH3.

If you have 500  mL of a 0.10 M solution of the acid, what mass of the corresponding sodium salt of the conjugate base do you need to make the buffer with a pH of 3.50 (assuming no change in... more

A 27.44 g sample of a substance is initially at 21.0 °C. After absorbing 2565 J of heat, the temperature of the substance is 156.6 °C. What is the specific heat (c) of the substance?  C= j/g °C

Which ionic compound forms an acidic solution when dissolved in water?NH4BrNaHCO3KClNaN

Calculate the Eocell for the redox reaction shown below in volts: Zn(s)+Ni+2(aq)→Zn+2(aq)+Ni(s)

Calculate ΔHo for the process ½ N2(g) + ½ O2(g) → NO(g)from the following information N2(g) + 2 O2(g) → 2 NO2(g)  ΔHo = -128.9 kJ/mol 2 NO(g) + O2 → 2 NO2(g)  ΔHo = -639.8 kJ/mol

When 27.50 liters of oxygen gas reacts with excess hydrogen gas at STP how many grams of water is produced?2 H2 + O2 —> 2 H2O