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What will be the experimental enthalpy of reaction when 0.5000g of zinc reacts with 20.00mL of 1.500M HCl, changing the temperatrure of the solution (surroundings) in the calorimeter by +13.5C?
Hint: write the balanced equation, and then calcualte how many moles are really reacting by determing of the limiting reactant.
Nitrogen dioxide (NO2) cannot be obtained in a pure form in the gas phase because it exists as a mixture of NO2 and N2O4. At 25°C and 0.98 atm, the density of this gas mixture is 2.7 g/L.
If a sample of pure silver (Ag) contains 3.35 x 1022 atoms of silver, how many moles of silver are in the sample?
A 771 mL gas sample at STP is compressed to a volume of 242 mL, and the temperature is increased to 31?C. What is the new pressure of the gas in Pa
an airplane is pressurized to 650 mmhg. The partial pressure of oxygen is 137 mmhg. If the partial pressure of oxygen drops below 100.mmhg.
In a solution of acetone and ethanol, the mole fraction of acetone is 0.40. What is the concentration of acetone as a mass percent?
A piston has an external pressure of 11.0 bar . How much work has been done if the cylinder goes from a volume of 0.150 liters to 0.570 liters.
Description of physical chemistry, Find delta Smix, delta Gmix, delta Hmix, and delta Vmix if 125 g of benzene and 25 g of naphthalene are mixed at 60 degrees C.
Consider the reaction NO + O3 → NO2 + O2 Which has a rate constant given by k = 1.8×10-12 e-1370/T cm3 molecules-1 s-1 .Use the following standard heats of formation.
Calculate the mass of silver chloride required to plate 245 mg of pure silver. Silver chloride, often used in silver plating, contains 75.27% Ag
Two objects at different temperatures are placed in a perfectly insulated calorimeter. When the system reaches equilibrium, which of the following statements is true?
Initially a mixture contains 0.795 mol each of N2 and O2 in an 8.00 L vessel. Find the equilibrium composition of the mixture at 3900 degrees Celcius.
The mass of a cube of iron is 324 g. Iron has a density of 7.87 g/cm3. What is the mass of a cube of lead that has the same dimensions?
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