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A piston has an external pressure of 12.0 \rm atm. How much work has been done if the cylinder goes from a volume of 0.120 liters to 0.500 liters.
Compute mole fraction of caffeine(C 8 H 10 N 4 O 2 ), the molarity of the solution
What proportion of benzoic of benzoic should be used with an equimolar mixture of adipic acid and hexamethylene diamine to produce a polymer of 10,000 molecular weigh at 99.5% conversion?
A gaseous mixture contains 450.0 Torr of H2(g), 358.7 Torr of N2(g), and 65.1 Torr of Ar(g). Calculate the mole fraction, X, of each of these gases.
What mass (in grams) of solid KCl would need to be added to 500 grams of water to make an ideal solution with a boiling point of 106.8
Calculate the mass of pure silver that when heated from 12.0 degrees celcius to 15.2 degrees celcius it required 1.25 kj of energy
A system conducts 238 cal of heat to the surroundings while delivering 331 cal of work. what is the change in internal energy of the system (in cal).
Calculating percent purity from a reaction, One of the reactions that occurs in a blast furnace, where iron ore is converted to cast iron is Fe2O3 + CO = Fe + CO2.
At a certain temperature, a volume of 100 mL of saturated barium carbonate solution contains 0.00216 g of BaCO3 (MW=197.3 g/mol).
Weight and volume measurements on a sample of pure cadmium showed its density to be 521 lb/ft3 is this a 3.5% error?
In the first step of the trypsin mechanism, the side-chain oxygen of Ser 195 attacks the carbonyl carbon of the substrate. Use PyMOL and your model of the enzyme substrate complex to determine the distance between these two atoms.
Calculate how many such photons are emitted per second by a 80.0-W incandescent lightbulb if we Assume that the light has an average wavelength = 510.0 nm, .
(A) What mass of Potassium hydrogen carbonate is needed? (B) What volume of 0.32 M HCl is needed to react completely with the amount of potassium hydrogen carbonate from 2(a)
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