How much heat was transferred and in which direction
If the internal energy of a thermodynamic system is increased by 300. J while 75 J of expansion work is done, how much heat was transferred and in which direction, to or from the system?
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Compound A has a solubility of 18 grams per 100 grams of water at25 Celsius. Cooling a saturated 200 g solution of compound Afrom 84 celsius to 25 celsius results in a precipitation of 19grams of the compound. Calculate the solubility of compound
Calculate the force acting on the submarine and the minimum power required to keep the submarine moving at this speed. density of water=1025kg m-3?
Waste water from certain industrial chemical processes contains aqueous ions. Since the mercury ion is toxic, it is removed from the waste water by reaction with aqueous sodium sulfide. The products of the reaction are solid mercury( I ) sulfide
What is the new pH of the solution after 6.50g solid sodium hydroxide is added to 1.00L of the solution and dissolved. (Assume there is no appreciable volume change with the addition of the solid.)
What is the half-life of a compound if 81 percent of a given sample of the compound decomposes in 64 min? Assume first-order kinetics.(Having the correct number of sig figs is critical)
What volume of 0.250 mol/L Ca(CH3COO)3 (calcium acetate) solution should you add to 25.00 mL of 0.500 mol/L CH3COOH to prepare a buffer solution which has a pH of 4. 754?
At 37oC the concentration of Fe3+ insidea cell is 0.082 M and outside is 0.013 M . The cell membrane ispermeable to Fe3+. What potential difference in volts would have to exist across the membrane for Fe3+ tobe in equilibrium at the stated conditi
Patients undergoing an upper GI tract lab test are typically givenan X-ray contrast agent that aids with the radiologic imaging ofthe anatomy. One such contrast agent is sodium diatrizoate (NaDTZ),a non-volatile water-soluble ionic compound.
Adding excess potassium hydroxide to an aluminum hydroxideprecipitate causes the precipitate to dissolve. Write an equationto describe the reaction.
Naturally occurring iodine has an atomic mass of 126.9045. A sample of 12.3849g gets contaminated with 1.00070g of a synthetic iodine with a mass of 128.9050. Find the apparent "atomic mass of the contaminated iodine".
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