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Calculate the total heat change, the ΔE, the PV work, and the ΔH when 54 g of ice is converted into54g of steam. [H2O(s) at -10°C converted toH2O(g) at 110°C]. Assume 1.0atm pressure. Use 2.0J/g °C for the specific heats of ice and steam, and 4.2J/g °C for the specific heat of water as a liquid. Use 6.0kJ/mole as the ΔHfus and41 kJ/mole as the ΔHvap for water. (warm ice+ melt ice + heat water + boil water + heat steam; sum the heat changes for each step) Will rate life saver!
The absolute configurations for cis-1,2-dimethylcyclopropane would be a) (R,R) b) (S,S) c) either (R,R) or (S,S) d) (R,S)
To a second 25.00 mL part, 10.00 mg of lead was added and extracted into a second 10.00 mL portion of the same organic solvent. This solution gave A = 0.525. What was the concentration of lead, in mg/mL, in the original sample?
The specific heat of silver is .24 j/g. How many joules of energy are need to warm 4.37g from 25 to 27.5 ?
Calculate the pH at the equivalence point in titrating 0.100 M solutions of each of the following with 7.0X10^-2 M NaOH. (a) hydrobromic acid (HBr)
Lake Lianna is fed by two rivers, the Matthew and the Andrew. You have made careful water chemistry measurements throughout the year and found that the two rivers have the following pH and alkalinity
mos2s 72 o2g moo3s 2 so2g moo3s 3 h2g mos 3 h2os calculate the volumes of air and hydrogen gas at 23degc and 1.00
An analysis shows that you need to neutral 3.27 meq/100gof acidity. How much of finely ground pure CaCO3 (in grams) is required to neutralize the acidity of this soil?
The osmotic pressure of blood at normal body temp of 37 deg C is 7.65 atm. Sometimes it is necessary to add a saline (NaCl) solution by intravenous injection to a patient in the ER.
A mixture containing 3.9 moles of NO and .94 moles of CO_2 was allowed to react in a flask at a certain temperature according to the equation
Use Coulomb's law to calculate the ionization energy in kJ/mol of an atom composed of a proton and an electron separated by 270.00 pm.
Describe how you would prepare 500 mL of 1.75 M HCl solution starting out with an 8.61 M stock solution of HCl.
Write out and balance the reaction for the decomposition of calcium chloride in water. Calculate the enthalpy of the reaction.
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