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A sample of gas is compressed from 13.01 L to 4.27 L using a constant external pressure of 3.63 atm. At the same time, 1,453 J of heat flows into the surroundings. What is the internal energy change for the gas? Give your answer in joules (J), accurate to three significant figures.
A 0.00445 mol sample of a weak acid, HY, is dissolved in enough water to form 0.0976 L of solution. If the pH of the solution is 4.02, what is the Ka of HY? Use E notation with 3 significant figures.
A 643 mL gas sample at STP is compressed to a volume of 285 mL, and the temperature is increased to 26C. What is the new pressure of the gas in Pa? Answer in units of Pa.
The density of the manometer fluid is 2.75 g/cm3. The height of the manometer fluid on side 1 is 324 mm. The height of the manometer fluid on side 2 is 326 mm
Poly(propylene) is made of one kind of monomer. Give the two monomers used to make nylon 6,6. Why are two monomers needed to make nylon 6,6 while only one is needed to make poly(propylene)?
Why does EDTA^4- cease to function as chelating ligand if acid is added to the solution
WHY did lactose produce mnCO2 in an anaerobic fermentation experiment? (Hint: lactase mechanism, how do sugar transporters work,
What characteristic properties distinguish the transition elements from the Group IA and -IIA metals?
If another sample of the same compound is decomposed and found to contain 8.46 g of oxygen, how many g of carbon must it contain?
How would I do that? I have a diagram for a trigonal bipyramidal crystal field and two values are on the diagram. There's a delta 0.19 and a delta 0.79.
What is the theoretical slope at 30°C What is , the electromotive efficiency to three significant figures. What is the pH of an unknown that gives a reading of 46.7 mV with this electrode at 30°C
A critical reaction in the production of energy to do work or drive chemical reactions in biological systems is the hydrolysis of adenosine triphosphate, ATP, to adenosine diphosphate, ADP, as described by
Compound A, optically active, with a formula of C6H14O reacts with Na2Cr2O7 in H2SO4 forms a new compound B with formula C6H12O and is optically active
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