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Calculate the heat released as 115 grams of water cool from its normal boiling point (100 degrees C) to a temperature of 33 degrees C. Express your answer in units of kilojoules. Your Help is Much Appreciated
What are the equilibrium partial pressure of H2 when equilibrium is reestablished following the addition of 0.200 mol of HI?
An unknown organic compound has the empirical formula C2H2O. A solution of 3.775 g of the unknown compound dissolved in 12.00 g of water is cooled until it freezes at a temperature of 4.72°C.
A 27.0-g sample of water at 250. K is mixed with 47.0 g water at 310. K. Calculate the final temperature of the mixture assuming no heat loss to the surroundings.
when the cations Na+ K+ Cs+ are combined with chloride ion in the gas phase to form ion pairs, which pair formation releases the greatest amount of energy? KCL or RbCl, or NaCl or CsCl.
A compound of bromine and fluorine is used to make UF6, which is an important chemical in processing and reprocessing of nuclear fuel. The compound contains 58.37% by mass of bromine. Determine its empirical formula.
The most common source of copper is the mineral chalcopyrite (CuFeS2) how many kilograms of chalcopyrite must be mined to obtain a 440 grams of pure copper.
during one of the processes at the plant. The two liquids are blended until a specific gravity of 1.445. Determine the mole percentage of the two components in the blend.
An iron bar of mass 781 g cools from 94°C to 5°C. Calculate the heat released (in kilojoules) by metal.
If 100.0 grams of copper (Cu) completely reacts with 25.0 grams of oxygen, how much copper(II) oxide (CuO) will form from 140.0 grams of copper and excess oxygen?
compute the enthalpy change, (Delta H), for this reaction per mole of A. suppose that the specific heat =[4.18J/(g*Degrees C) and density=1.00(g/mL)?
Use the de Broglie relationship to determine the wavelengths of the following objects: an lithium atom moving at 2.5*10^5m/sUsing Heisenberg's uncertainty principle,
What is the pH of the sodium phosphate buffer described in problem if 1 ml of 10M NaOH is added? What is the pH of 1 liter of water if 1ml of NaOH is added?
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