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A total of 2.00 \rm mol of a compound is allowed to react with water in a foam coffee cup and the reaction produces 124g of solution. The reaction caused the temperature of the solution to rise from 21.0 to 24.7 ^\circ \rm C. What is the enthalpy of this reaction? Assume that no heat is lost to the surroundings or to the coffee cup itself and that the specific heat of the solution is the same as that of pure water. Enter your answer in kilojoules per mole of compound to three significant figures.
Balance the following redox equation . Once you have balanced the equation calculate how many grams of ammonia will be produced starting from 10 g of Zn
A copper zincs voltaic cell is constructed using 100 ml solutions if 1 M solutions of copper sulfate and zincs sulfate with a sodium sulfate salt Bruges.
How many liters of carbon dioxide are produced when 5.00x10^23 molecules of oxygen react? How many grams of water are produced if 25.0 L of oxygen gas react?
In terms of uncertainty, why is an endpoint volume of 9 mL less preferred than an endpoint volume of 35 mL? In terms of uncertainty, why is an endpoint volume of 55 mL less preferred than a volume of 35 mL?
A helium-filled weather balloon has a volume of 714 L at 23 oC and 759 mmHg. It is released and rises to an altitude of 4.80 km, where the pressure is 495 mm Hg and the temperature is -9oC. what is the volume of the balloon at this altitude.
From data below, calculate the total heat (in J) associated with the conversion of 0.412 mol ethanol gas (C2H6O) at 501°C and 1 atm to liquid ethanol at 25.0°C and 1 atm
The volume of a gas sample is 200L at 740 torr. what is its volume at 760 torr? Assume that the Temperature remains constant
Describe how you would prepare the buffer solution using one of the weak bases listed in the Table below and any other necessary reagents.
what fraction of the band would be filled with electrons? Assume that all valence bands (5s, 4d, and 5p) overlap. Show your work and your resulting band diagram.
A gas is initially at 1.2 atm, 15.0 L, and O°C. What is the final pressure when the same amount of gas is heated to 10°C and the volume changed to 24.0 L
In the reaction below, 6.15 atm each of H2 and I2 were placed into a 1.00 L flask and allowed to react: H2(g) + I2(g) 2 HI(g) Given that Kc = 45.5, calculate the equilibrium pressure of H2.
with a solution in them connected by a liquid salt bridge junction filled with KNO3. In one solution you have a graphite electrode that is connected with a wire to a copper electrode in the second soution. The soution in contact with the graphite ..
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