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Explain a solution is prepared by dissolving 57.87 grams of NaCl in enough water to make 2525mL of solution. Explain what is the molarity of the solution?
Calculate the entropy change that occurs when 3.5 moles of an ideal gas expands from 1.75 L at 20 degress Celsius to 8.46 L at .54 atm.
A system has four energy levels. The degeneracies of these energy levels are as follows: g0 = 3, g1 = 2, g2 = 1, g3 = 4. For 20 gas molecules, at T = 0 K, how many molecules are in the first excited state
For the following aqueous reaction, write a complete and balanced net ionic equation for MnS + HBr. And name states.
an electrochemical cell has n 5 of electronstransferred. at t 434.97k ecellnbsp0.65115 volts and at t 303.24k
A solution is prepared by dissolving 285 g of sucrose (C12H22O11) in 624 g of water. What is the vapor pressure of this solution at 30°C? (The vapor pressure of water is 31.8 mmHg at 30°C.)
calculating the pH of a strong acid the concentration of H+ ions is taken to be the same as the initial concentration of the reactant. According to the equations I've seen [H+][OH-] = 10^
At 25°C, you take 100 mg of Na2CO3 as well as 100 mg of CaCl2; place them into a 1 L volumetric flask as well as add water at a pH=9.0. Will CaCO3 precipitate. Presume closed system with a constant pH
Pressurized carbon dioxide inflators can be used to inflate a bicycle tire in the event of a flat. These inflators use metal cartridges that contain 16.0 of carbon dioxide. At 290 , to what pressure (in psi) can the carbon dioxide in the cartridge..
When the following reaction is balanced in basic solution using the lowest possible whole number coefficients, the coefficient of PbO2(s) will be: BrO3-(aq) + Pb(OH)42-(aq) --> Br-(aq) + PbO2(s)
A biochemical engineer isolates a bacterial gene fragment and dissolves a 10.9 mg sample of the material in enough water to make 36.5 mL of solution. The osmotic pressure of the solution is 0.340 torr at 25°C. (a) What is the molar mass of the gen..
what is the vapor pressure of the solution at 20 °C? Values at 20 degress celsius
Determine the heats of formation or the steric energies of the exo- and endo-anhydride adducts using a molecular mechanics program.
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