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The original volume of a gas was 500 ml. When the pressure was decreased to 1.3 pascals, the volume increased to 700 ml. What was the original pressure?
The partial charge on the phosphorus atom in the PO4(-3) ion is +2.52. What is the partial charge on each oxygen atom
cortisone is a steroid used to treat joint inflammation. each cortisone molecule contains 21 atoms of carbon plus
if 25.0 mL of 0.125 M HCl is neutralized by exactly 14.8 mL of NaOH, what is the concentration of the base?
The equilibrium constant for this reaction at 1400K is 4.7. A mixture of reactants and products at 1400K contains 0.035 M H2O, 0.050 M CH4, 0.15 M CO, and 0.20 M H2
Use ΔG=ΔH-TΔS to calculate the standard free energy change, ΔG, at 25oC for the following reaction: CaCO3(s)-->CO2(g) + CaO(s)
The specific rotation, [?]D, for (+)-tartaric acid is +12. What is the observed rotation for a solution of 0.75 g of (+)-tartaric acid in 10 mL of water in a sample tube having a pathlength of 10 cm?
The first-order reaction for Hydorgen peroxide decomposing to H20 and O2 (aq). The rate constant at 25 C is 7.40 x 10^-4/second. Calculate the volume of O2 obtained form the decomposition reaction of 1 mol hydrogen peroxide at 25 C and 740 mmHg af..
2.A) Carbon dioxide dissolves in water to form carbonic acid. Estimate the thermodynamic equilibrium constant for this reaction using the ΔGf° values shown here.2.B) Carbonic acid then ionizes in water (Ka1 = 4.5× 10-7). Ignoring Ka2, estimate K for ..
Determine the empirical and molecular formulas of Ibuprofen has 75.69% C, 8.80%H and 15.51%O by mass and has a molar mass about 206g/mol.
Explain what are the concentrations of acetic acid as well as acetate ion in 0.20M acetate buffer, pH 4.90. The pKa of acetate is 4.76.
The activation energy for the gas phase decomposition of t-butyl bromide is 170 kJ/mol.
The specific heat capacities of Fe(s) and water are 0.45 J/g? and 4.184 J/g?, respectively. What is the final temperature of the system?
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