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Find the pH and fraction of dissociation of a 0.100 M solution of the weak acid HA with Ka= 1.00 x 10-5.
A sample of gas is collected over water at 14 degrees Celsius. The pressure of the resultant mixture is 113.0 kPa. What is the pressure exerted by the hydrogen alone?
A gas mixture composed of helium and argon has a density of 0.727g/L at a 755mmHg and 298K .What is the composition of the mixture by volume?
Calculate the experimental percent by mass of copper in the sample and the theoretical mass percent of copper in copper (II) acetate monohydrate.
A student is asked to determine the formula of a hydrate of colbalt (II) chloride. The mass of the empty clean, dry crucible and cover, after heating is 22.446 g. A sample of 0.324 g of cobalt chloride is added to the crucible.
a cylinder of compressed gas has a pressure of 4.882 atm on one day. the next day the same cylinder of gas has a pressure of 4.690 atm, and its temperature is 8 degrees celcius. what was the temperature on the previous day?
What concentration of Benzoyl peroxide (k_d = 1.45 * 10^(-6) L/mol-s, 60 deg C) would be needed to polymerize a 1.00 M solution of styrene to a molecular weight of 2500
Calculate the osmotic pressure of a 20% sucrose solution given that the molecular weight of sucrose is 342g.
A mixture of gas contains 46.3 % methane, 37.2% ethane and 16.5% propane(by mass). A 477g sample of the gass is burned with exces oxygen
Calculate change in E, q, w, and change in H and the final temp if the expansion is carried out according to each of the following paths:
what will the equilibrium concentrations of all 4 substances be? FAlways start by writing expression for Keq FThink about what will happen. Which concentrations will increase? Decrease?
A voltaic cell consists of a Mn/Mn2+ electrode (E°= -1.18 V) and a Fe/Fe2+ electrode (E°= -0.44 V). Calculate [Fe2+] if [Mn2+] = 0.050 M and Ecell = 0.78 V at 25°C.
Does anyone now the balanced equation (including moles for each reactant and product) for 1-pyrrolidino cyclohexene
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