Chemistry Answers

A mixture of 0.100 mol of NO, 0.050 mol of H2 and 0.10 mol of H2O is placed in a 1.0L vessel at 300 K. The following equilibrium is established: 2 NO(g) + 2 H2O(g). At equilibrium [NO] = 0.062 M. Calculate the equilibrium concentrations of N2

375cmcube of gas has a pressure of 770mmhg. Find it's volume if the pressure is reduced to 750mmhg

The measured pH of the H2SO4 solution in water is 1.8. Calculate the volume of water needed to add to 1.00 L of this solution to increase the pH to 2.55 (The pH scale problem)

2.   A carbonate buffer of pH 10 is needed by a chemist. How many grams of Na₂CO₃ is needed to dissolve in 1.5L of 0.2M NaHCO₃ to make the buffer? K_a of HCO₃^- = 4.7 x 10^-11

1. What is the ionic strength of a solution composed of 0.M NaCl and 0.2M Na2SO4?

In the reaction Mg(OH)2 + 2HCl → MgCl2 + 2H2 O, you were given 15 grams of Mg(OH)2 and 25 grams of HCl. Which of the two reactants is the limiting reagent? How much MgCl2 will be produced in the reaction? (Mg(OH)2 = 58.32 g/mol, HCl = 36.46 g/mol, MgCl2 = 95.32 g/mol)

The measured pH of the H2SO4 solution in water is 1.8. Calculate the volume of water needed to add to 1.00 L of this solution to increase the pH to 2.55 (The pH scale problem)

The measured pH of the H2SO4 solution in water is 1.8. Calculate the volume of water needed to add to 1.00 L of this solution to increase the pH to 2.55 (The pH scale problem)

If solid CO2, is at 10 atm and the temperature is increased to -50C what state of matter will the CO2 be in and what is this process called?

Calculate the entropy change of freezing of 20.0 g liquid metal mercury at -38.9°C (molar enthalpy of fusion of mercury is 2.33kJ/mol)