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A1.15 g sample of dry ice is added to a 765 mL flask containing nitrogen gas at a temperature of 25.0 C and a pressure of 715 mm Hg. The dry ice is allowed to sublime (convert from solid to gas) and the mixture is allowed to return to 25.0 C. What is the total pressure in the flask?
What mass of ice at 0C must be added to 45g of water at 20C to cool it to the final temperature of 10C?
A helium balloon at a high altitude has 2.1 × 104 L of helium at 0.40 atm and -13°C. If the balloon descends to an altitude in which the atmospheric pressure is 1.00 atm and the temperature is 20°C.
At 80 °C the vapor pressures of pure liquids X, Y, and Z are 385, 190, and 66 mm Hg, respectively. What pressure must be exerted on the surface of a solution
A sculptor has prepared a mold for casting a bronze figure. The figure has a volume of 225 mL. If bronze has a density of 7.8 g/mL
Persistent Organic Pollutanants- Bioaccumulation Measurements, Compare the worst case scenario, i.e. the strongest tendency to bioaccumulation for each toxin.
The vapor pressure of chlorine dioxide (ClO2) is 155 Torr at 22.75 C and 485 Torrat 0C. what is the standard enthalpy of vaporization?
How many liters of oxygen gas, at standard temperature and pressure, will react with 25.0 grams of magnesium metal? 2 Mg + O2 yields 2 MgO
Determine the mass of a mixture of 1.33x10^24 formula units of Sodium sulfate, 1.500 moles of Water and 3.77g of silver chloride?
Calculating standard enthalpy change, heat, and mass of a reaction, Methanol (CH3OH) is used as fuel in race cars. Calculate the standard enthalpy change for the reaction, assuming H2O(g) as a product.
The rate constant for a certain reaction is K = 8.90×10^-3 . If the initial reactant concentration was 0.950 M, what will the concentration be after 14.0 minutes.
How many milliliters of 1.50 M H2SO4 are needed to neutralize 50.0 g of NaOH?
NiCl2(aq)+ 2NaOH(aq)---> Ni(OH)2(s)+ 2NaCl(aq) how many grams of Ni(OH)2 are produced from the reaction of 35.0 mL of a 1.75M NaOH solution and excess of NiCl2.
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