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What mass of benzoic acid, , would you dissolve in 300.0 of water to produce a solution with a = 2.75?
What volumes of .200 M HCOOH and 2.00 M NaOH would make 300 mL of a buffer with the pH of one made from 475 mL of .200 M benzoic acid and 25 mL of 2.00 M NaOH?
use standard reduction potentials to find the equilibrium constant for the following reaction at 25 degrees C.
the specific heat of silver is 0.24 J/g degree celsius. how many joules of energy are needed to warm 4.37 g of silver from 25 degree celsius to 27.5 degree celsius?
What is the mole fraction of pentane in a pentane-hexane solution that has a vapour pressure of 308 torr at 25 oC? (At 25 oC the vapour pressure of pure pentane is 511 torr and that of hexane is 150 torr.)
Combustion reaction, A fuel has the following weight percentage composition, C = 52%, H = 11%, S = 0%, O = 9%, moisture = 13%, Ash = 15%
In the following reaction, how many grams of NaBr will produce 244 grams of NaNO3? Pb(NO3)2(aq) + 2 NaBr(aq) PbBr2(s) + 2 NaNO3(aq)
how much energy is required to turn 500 g of ice at -15.0 celsius to liquid water at 55.0 celsius? specific heat (ice) = 2.10 J/g * C. Specific heat (water)= 4.18 J/g*C
A solution is initially 2.5 x 10-3 M in Cu+ and 2.5 x 10-3 in Pb 2+. Iodine ion is gradually added to the solution. Determine the concentrations of Cu+, Pb +2, and I- at the point of maximum separation. The solubility products of CuI and PbI2 are ..
What is the partial pressure of each gas and total pressure of the mixture of gaases, in atmospheres, in the container?
he initial rate of reaction of H2O2 -- H2O + 1/2O2 is found to be 1.7*10^-3 M S^-1. Assume that this rate holds for 2 minutes. Start with 165ml of 1.60M H2O2 at t=0. How many milliliters of O2 measured at 24C and 757mmHg
A tank contains 480. grams of oxygen and 80.0 grams of helium at a total pressure of 7.00 atm. Calculathte following.
The solid fuel in the booster stage of the space shuttle is a mixture of ammonium perchlorate and aluminum powder. On ignition, the reaction that takes place is 6 NH4ClO4(s) + 10 Al(s) ? 5 Al2O3(s) + 3 N2(g) + 6 HCl(g) + 9 H2O(g)
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