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A total of 2.00 of a compound is allowed to react with water in a foam coffee cup and the reaction produces 199 of solution. The reaction caused the temperature of the solution to rise from 21.0 to 24.7 . 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 figure
Which of the following pairs of aqueous solutions will react when mixed?
What is the partial pressure of Br2 at equilibrium? What is the partial pressure of I2 at equilibrium? What is the partial pressure of IBr at equilibrium?
An element crystallizes in a face-centered cubic lattice. The edge of the unit cell is 392 pm, and the density of the crystal is 21.45 g/cm3. Calculate the atomic weight of the element (in g/mol)
Copper (II) oxide can be reduced to copper metal by heating in a stream of hydrogen gas:CuO(s) +H2(g) -heat--> Cu(s) +H2O(g)
A substance has a solubility of 350 ppm. How many grams of the substance are present in 1.0 L of a saturated solution.
How many J of heat are necessary to raise the temperature of a 1.05-kg block of iron from 25.0 C to 88.5 C?
5000 joules of energy are added to 108 grams of silver, Ag, at 20°C. What is the final temperature of the metal? (the specific heat of silver is 0.235)
If your electricity comes from a 33% efficient nuclear power plant, how many Pu-239 nuclei are produced as a result of your leaving the light on?
how many moles of Ba(OH)2 are present in 165ml of 0.600M Ba(OH)2.
The three pKa values for phosphoric acid are 2.3, 7.2, and 12.1. Calculate the amount of each salt that you will need to prepare the buffer.
Zn(s) + 2AgNO3(aq) --> 2Ag(s) + Zn(NO3)2(aq) When 216 g of silver was produced, determine the mole(s) of silver nitrate would be required.
What is the concentration of a solution of lithium carbonate containing 0.01 mol in 750 mL of solution? Give your answer to two significant figures and include the units as mol L-1 ie 0.36 mol L-1
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