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Compute the volume of a 20.0ug/mL Fe2+ solution needed to make standard Fe2+ solutions of 5.0ug/mL, 1.0ug/mL, and 0.50ug/mL in 100mL volumetric flasks.
Given the same reactant concentrations, the reaction CO(g)+Cl2(g)------COCl2(g) at 251 degrees celsius is 66.9 times as fast as the same reaction at 165 degrees celcius. Calculate the activation energy for this reaction
Compute ΔS for each of the subsequent changes in state of 2.5 mol of a perfect monatomic gas with CV = 1.5R for all temperatures
The temperature of 3.50 kg of water is raised by 1.17°C when 1.00 g of hydrazine N2H4 is burned in a bomb calorimeter. The bomb has a heat capacity of 883 J/°C. How much heat is given off by the sample
Precisely 14.3 mL of water at 30.0 degrees Celsius are additional to a hot iron skillet. All of the water is rehabilitated into steam at 100 degrees Celsius. The mass of the pan is 1.25 kg also the molar heat capacity of iron is 25.19 J/(mol*degre..
a stock solution is prepared by adding 15 ml of 2.5 m bacn2 to enough water to make 20 ml. what is the cn-
suppose that a cars starter draws 225A of current for 6.3 s to start the car. what mass of Pb is oxidized in the lead-acid battery to supply the electricity?(in grams)
Magnesium metal reacts with HCl solution, liberating H2 gas and generating Mg2+ cations in solution. A 1.505-g sample of Mg metal is added to 150.0 mL of a 4.00 M HCl solution, and the reaction goes to completion. What mass of H2 is formed
Calculate the number of joules of heat required to change 85.0 grams of water at 25 degrees C to steam at 100 degrees C (heat of vaporization of water = 2260 J/g and specific heat of water = 4.18 J/g C)
it was found that 19.31 ml of an hcl solution are needed to react completely with 322 ml of a lioh solution that has a
Calculate the amount of heat liberated (in kJ) from 437 g of mercury when it cools from 61.0°C to 12.0°C.
Calculate the pH and pOH of a solution of HI made by dissolving 3 x 10 ^-5 moles of HI (a strong acid) in 570 mL of water.
A mixture containing only BaSO4 and CaSO4 contains one-half as much Ba2+ as Ca2+ by weight. What is the percentage of CaSO4 in the mixture
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