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Compute x, the number of molecules of water in oxalic acid hydrate, H2C2O4 multiplied by (x) H2O, from the following data 5.00g of the compound is made up to exactly 250mL solution and 25.0mL of this solution requires 15.9mL of 0.500 M NaOH solution for neutralization.
The molar enthalpy of fusion of ice is 6.0 KJ/mol-K at 0 degrees Celsius. Define the heat capacities of water as well as ice in the vicinity of freezing point are 75.3 J/mol-K and 38.0 J/mol-K, respectively.
Tooth enamel is mainly hydroxapatite,Ca10(PO4)6(OH)2. If 1.117g of tooth enamel reacts with acid to give 1.111g of calicul chloride, what is the percentage of hydroxyapatite in the tooth enamel sample
A second worker approaches to within 5 meters behind a shield that attenuates 60% and remains there for 20.0 minutes. What is the ration between the absorbed doses for the two workers
nicotine a component of tobacco is composed of c h and n. a 12.075 mg sample of nicotine was combusted producing 32.757
what is the minimum velocity that the fluid should travel at in order to remain in the most efficient flow regime for heat tranfer if the fluid is i)water ii)paraffin oil iii) helium (1 atm) in each case Tinfinity= 75 deg
The activity of the mixed sample was found to be 4.35 x 107 dpm for a sample of 0.125 mg of Pu. Calculate the weight % of each Pu isotope present.
Use the Clausius-Clapeyron equation to estimate the boiling point of water at 24.0.torr pressure. The average enthalpy of vaporization for water over the relevant temperature range is 42.34 kJ/mol.
The normal boiling point of C2Cl3F3 is 47.6 degrees Celsius and its molar enthalpy of vaporization is 27.49 kJ/mol. What is the change in entropy in the system in J/K when 28.6 grams of C2Cl3F3 vaporizes to a gas at the normal boiling point
A chemist wants to kilute 7.50 M HNO3 to make 800 mL of a 4.00 M HNo3 solution. What is the new volume
A 0.150-mole quantity of NiCl2 is added to a liter of 1.20 M NH3 solution. What is the concentration of Ni2 ions at equilibrium. Assume the formation constant* of Ni(NH3)62 is 5.5 × 108.
Draw a resonance structure, complete with all formal charges and lone (unshared) electron pairs, that shows the resonance interaction of the acetyl with the ortho position in acetophenone
Which would be safer if exposed to a flame, a gas can full of gasoline or a can with half air and half gasoline. Explain.
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