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A 50.0 kg mixture of salt and water is 15.0% (by mass) salt. give the mass of salt and water in the mixture
Geologists can estimate the age of rocks by their uranium-238 content. The uranium is incorporated in the rock as it hardens and then decays with first-order kinetics and a half-life of 4.5 billion years. A rock is found to contain 84.3% of the am..
The Kw value decreases and temperature decreases. Is the auto ionization of water exothermic or endothermic
What is the rate of consumption of isobutylbenzene inside the reactor. What is the flow rate of isobutylbenzene out of the reactor? What is the fractional conversion
Consider the effects of local environment on the acidity of the following amino acid residues within a protein. in each case, state whether the side chain pka of the underlined residue will increase, decrease, or remain the same. then briefly stat..
Calculate the change in internal energy, u2-u1 in kJ/kg of Oxygen (O2) when the temperature of the gas is increased from 250K to 800K. Assume a constant specific heat. Use table A-20 to determine an appropriate value of the specific heat.
Suppose that in changing samples, a portion of the water in the calorimeter weere lost. In what way, if any, would this change the heat capacity of the calorimeter?
What mass of NaCl must be dissolved in 75.0 grams of water to lower the freezing point to -4.00c? The freezing point depression constant, Kfp for water is -1.83 C/m.
A 1.00 L buffer solution is 0.150 M in HC7H5O2 and 0.250 M in LiC7H5O2. Calculate the pH of the solution after the addition of 100.0 mL of 1.00 M HCl. The Ka for HC7H5O2 is 6.5 x 10^-5
Calculate the amount of heat liberated (in kJ) from 417 g of mercury when it cools from 64.0°C to 12.0°C.
The value of ?G° for a reaction conducted at 25 °C is 2.8 kJ/mol The equilibrium constant for a reaction is at this temperature
What is the pH of a solution obtained by adding 75.0mL of 0.366M CsOH to 250.0 ml Ba(OH)2 solution with a pH of 11.65.
If all of these tires were burned with complete efficiency, by how much (in tonnes) would Earth's current atmospheric load of C02 increase
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