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Predict a melting point if you combined and mixed 10 mg each of the three reference samples for solubility (naphthalene, benzoic acid and benzophenone). Provide a statement that supports your prediction.
Explain under constant-volume conditions the heat of combustion of benzoic acid, HC7H5O3, is 26.38 KJ/g. a 1.200 g sample of benzoic acid is burned in a bomb calorimeter.
A silver block, initially at 59.9 degree centigrade, is submerged into 100.0 g of water at 24.4 degree centigrade, in an insulated container. The final temperature of the mixture upon reaching thermal equilibrium is 25.6 degree centigrade. What is..
Ammonia is both a donor and an acceptor of hydrogen in hydrogen-bond formation. Draw a diagram showing the hydrogen bonding of an ammonia molecule with two other ammonia molecules.
naturally occurring silver contains 107ag amu 106.91 and 109ag amu 108.90 with mass percentages of 51.840 and 48.160
A- two more interior electron shells or two electron shells with large differences in nB- two more exterior electron shells or two electron shells with large differences in nC- two more interior electron shells or two adjacent electron shells D- tw..
A student decomposes KClO3 as well as collects 35.5 cm3 of O2 over water at 23°C. The laboratory barometer reads 746torr. If the vapor pressure of water at 23°C is 21.1torr. Determine the volume the dry oxygen would occupy at 0°C and 1.000 atm.
The acid dissociation for a weak acid Hx at 25c is 1.6x10^-8. Calculate the free energy information for x-(aq) at 25c. The standard free energy of Ax(aq)
Given: H-H bond energy = 435 kJ, Cl-Cl bond energy = 243 kJ, and the standard heat of formation of HCl(g) is -92 kJ/mol, calculate the H-Cl bond energy.
Describe the effect of insulin, glucagon, epinephrine and cortisol on metabolic processes in the liver
Assuming that at low pH the principle species in solution is HA and at high pH the principle species is A-, calculate the pKa of the indicator.
Enthalpy of combustion of ethanol(g) is -1371 kJ/mol. Temperature and pressure of intake mixture is 25 oC and 1 bar, respectively. Assume ideal behavior of diatomic gas and ignore the changes in the number of moles of gas during combustion.
Consider the following generic chemical equation. A+3B=C What is the limiting reactant when each of the following amounts of A and B are allowed to react. 1)1mol A, 4mol B 2)2mol A, 3mol B 3).5mol A, 1.6mol B 4)24mol A, 75mol B
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