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Calculate the enthalpy change, , for the process in which 41.5 of water is converted from liquid at 2.1 to vapor at 25.0.For water, = 44.0 at 25.0 and = 4.18 for
what is the energy uncertainty associated with a short pulse of laser light that lasts 4.8fs
Calculate the amount of heat required to heat a 3.8kg gold bar from 27 degree celsius to 63 degree celsius.
A total of 0.155 of this subunit was dissolved in enough water to produce 2.00 of solution. At 28 the osmotic pressure produced by the solution was 0.138 . What is the molar mass of the protein?
If solubility of a gas is 7.5 g/L at 404 kPa pressure, what is the solubility of the gas when the pressure is 2021 kPa?
What is the exact alkalinity of a water that contains 0.6580 mg/L of bicarbonate, as the ion, at a pH of 5.66? No carbonate is present.
A battery is constructed based on the oxidation of magnesium and the reduction of Cu^2+. The initial concentrations of Mg^2+ and Cu^2+ are 1.2×10?4M and 1.6M, respectively, in 1.0-liter half-cells.
A buffer is made using 45.0 mL of 0.750 M HC3H5O2 and 55.0 mL of 0.700 M NaC3H5O2.What volume of 0.10 M NaOH must be added to change the pH of the original buffer solution by 2.5%? Ka for this acid is 1.3 x 10
if H2 of 50.0 mL and C 2 H 4 of 50.0 mL are permitted to react at the pressure of 1.5 atm, produce C 2 H 6 that has a volume of 50.0 mille litres.. compute the amount of (PV )work done?
Compute the molecular formula of CH 3 COOH the percent composition of acetic acid is 39.99% C and 6.73% H. The remainder of the compound is oxygen.(The molar mass of acetic acid is 60.06 g/mol.)
a solution of 1 ppm Pb2+was prepared and dispensed 1 mL of it using a volumetric transfer pipette, also the same solution was dispensed using a measuring (Mohr) pipette.
Titrate 80ml of NH3 w/35ml of 0.30M HCl. Find pH and select an indicator beside bromocresol green that can be used.
if each reactant molecule in the above image represents 0.0157 mol and the reaction yields is 89%, how many grams of Si-containing product form?
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