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What type of energy, kinetic or potential, is contained in chemicals? What aspect of chemicals is changed during a chemical reaction such that reactions relate to chemical energy?
There is an inherent flaw in the drying procedure for the gravimetric determination that causes the measured mass of BaSO4 to be erroneously high
Aspirin (C9H8O4) is produced through the following reaction of salicylic acid (C7H6O3) and acetic anhydride (C4H6O3). C7H6O3(s) + C4H6O3-> C9H8O4(s) + HC2H3O2
After the addition of a large excess of acid (in comparison with the acid volume needed to reach the equivalence point) D) tell how many millileters of acid are required to reach the equivalence point
A solution is made by dissolving 0.45 moles of LiCl to make 150 mL of aqueous solution. What is the molarity of the solution?
What is the pH at the point during a titration when 34 mL of 0.200 M HCl has been added to 33 mL of 0.0500 M NH3 solution? HCl is strong acid, Kb = 1.8 × 10-5 for NH3.
Compute the final temperature of the mixture (assuming no heat loss to the surroundings). The heat capacities of H2O(s) and H2O (l) are 2.08 and 4.18 J/g · °C, respectively, enthalpy of fusion for ice = 6.02 kJ/mol.
How much ethylene glycol (C2H6O2) the major component of antifreeze, must be added to 1 L of water to keep it from at -15 F? Kf= 1.86 C/m.
Calculate the pH for the soluton after addition of solid sodium formate to cause the formate ion (CHOO-) to increase to 0.2 M
Assume that the kinetic energy of a 1250 kg car moving at 115 km/h could be converted entirely into heat. What amount of water could be heated from 19 C to 48 C by the car's energy.
Which of the following isotopes is more likely to decay via positron emission rather than electron emission.
A reaction mixture containing 20 mM O-acetyl serine, 50 mM NaCl, 50 mM HEPES buffer (pH 7.6), and O-acetyl serine acetylase is incubated in 37C until O-acetyl serine is completely hydrolyzed.
An unknown compound contains only C, H, and O. Combustion of 3.60 g of this compound produced 8.18 g of CO2 and 3.35 g of H2O.
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