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Assuming the solution has a heat capacity of 4.18 J/°C · g and assuming no heat loss to the calorimeter, calculate the enthalpy change for the dissolution of NH4NO3 in units of kJ/mol.
Calculate the vapor pressure of pure ethanol at 40.0 degrees C asuming that glycerin is a nonvolatile, nonelectrolyte solute in ethanol.
The vapor pressure of dichloromethane, rm CH_2Cl_2, at 0 rm ^{circ}C is 134 rm mmHg. The normal boiling point of dichloromethane is 40. rm ^{circ}C. Calculate its molar heat of vaporization.
What will be the total pressure when the reaction has gone to completion? What will be the total gas pressure when the partial pressure of A(g) has fallen to 8.00x10^2 mmHg?
Sodium nitrate was added to 2.0 L of water at 25 °C to produce a saturated solution. The solution was then heated to 80 °C. Calculate the mass of lead nitrate that had to be added to produce a
Calculate for the combustion of octane by using enthalpies of formation.
A mixture contains 76.5 % NaCl, 6.5 % MgCl_2, and 17.0 % Na_2SO_4 by mass. What is the molarity of rm Cl^- ions in a solution formed by dissolving 7.40 g of the mixture in enough water to form 490.0
How many L of hydrogen are needed to drive to the Grand Canyon, 789 miles away?. The density of hydrogen is 8.99x10 to the negative 5 g/cm cube.
Assuming the composition of coal can be approximated by the formular C135H96O9NS. Calculate the mass of carbon in tonnes of coal
What characteristic properties distinguish the transition elements from the Group IA and-IIA metals?
Pure benezene has melting point of 5.5 degree celsius. change in heat for benzene is 9.87 KJ/Mol. Calculate the number of joules required to melt 43.6g benzene at 5.5 degree celsius.
2SO2 (g) + O2 (g) ↔ 2SO3 (g) A study of this system reveals that there are 4.0E-3 moles of sulfur dioxide gas, and 4.9E-3 moles of oxygen gas present in a 9.0L flask at equilibrium. The equi
Compute the change in temperature when 1.1 g of sodium chloride is dissolved in 300.0 mL of water initially at 26 C. The heat capacity of water is 4.184 J/mL/K. Neglect the heat capacity of the NaCl
What does this tell you about the equilibrium constants for the two reactions of hemoglobin with carbon monoxide and oxygen?
When 1.5173 g of an organic iron compound containing C, H, O, and Fe was burned in O2, 2.838 g of CO2 and 0.8122 g of H2O were produced. In a separate experiment to determine the mass % of iron, 0.
anabolic steroid has been determined, how might you use this method to determine the possibility of the use of anabolic steroids by an athlete?
Write a balanced half-reaction describing the reduction of gaseous dioxygen to aqueous oxide anions
A 1.00 g sample of a large biomolecule was dissolved in 18.0 g of carbon tetrachloride. The boiling point of this solution was determined to be 77.85°C.
Sodium hydrogen carbonate, and sodium chloride, are both soluble in water. Will a double replacement reaction take place if a solution of sodium hydrogen carbonate is added to a solution of sodium
A 81 L sample of dry air cools from 145C to -22C while the pressure is maintained at 2.85 atm. What is the final volume?
Suppose the wind speed in a hurricane is [09] mph (mi/h). (a) Find the difference in air pressure (Pa) outside a home and inside a home (where the wind speed is zero). The density of air is
A student placed 17.5 g of glucose in a volumetric flask, added enough water to dissolve the glucose by swirling, then carefully added additional water until the 100 mL mark on the neck of the flask
What would you expect to happen if you combined 10.0 ml of 10^-2 M acetic acid and 5.0 ml of 10^-2 M sodium hydroxide? what would be the concentrations of acetic acid and sodium acetate in this sol
What is the molality of a solution of glucose that contains 48.0 g of C6H12O6 dissolved in 410.0 g of water? Use molar masses with at least as many significant figures as the data given.
Compare the pH values in the dilution for the strong acid(HCL) and the weak acid(acetic acid). Do the pH values increase at the same rate across the wells?