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A coffee-cup (constant pressure) calorimeter is used to carry out the following reaction in 55 mL water (where X is a hypothetical metal):
X + 2 H2O → X(OH)2 + H2
In this process, the water temperature rose from 25.0 °C to 39 °C. If 0.00516 mol of "X" was consumed during the reaction, what is ΔrH of this reaction in kJ mol-1 with respect to "X"?
The specific heat of water is 4.184 J g-1 °C-1
Calculate (E^o), (delta G^o) and K for the spontaneous direction. Ga+2 + Br2(l) Ga3+ (aq) + 2Br^- (aq)
Draw diagrams to show the various orientations in which a p orbital and a d orbital on adjacent atoms may form bonding and anti-bonding molecular orbitals.
For instance it is utilized to make the refrigerant carbon tetrafluoride CF4 via the reaction 2COF2(g)?CO2(g)+CF4(g), Kc=5.10 If only COF2 is present initially at a concentration of 2.00 M, explain what concentration of COF2 remains at equilibrium
The solubility of an unknown salt, M3Z2, at 25°C is 6.3 × 10-7 mol/L. What is the Ksp for M3Z2 at 25°C
Show utilizing an example that the following two formulations of the Pauli Exclusion Principle are equivalent. Wave function explaining a many-electron system must change sign under the exchange of any electrons.
What species are present in an aqueous solution of CuSO4. (Assume that Cu2+ is six coordinate and sulfate is a non-coordinating anion).
Give specific outline as to how you would prepare the solution by two different methods, one by dilution and one by weighing pure chemical. (Show calculation, what type of glassware is used, include size and kinds of pipets and flasks)
chemical reaction is run in which 263 Joules of heat are generated and the internal energy changes by -128 Joules.
Write a complete set of quantrum numbers (n,l and m) that quantum theories allows for each of the following orbital (A) 2p and (B) 3d
What each test reveals about an unknown halide ion? Suggest another test which would confirm that identity. 1.Addition of Cl2 and CH2Cl2 to an aqueous solution of an unknown halide ion led to a dark CH2Cl2 layer.
The total surface area of the earth consisting of forest, cultivated land, grassland, and desert is 1.49 x 108 km2 . Every year, the mass of carbon fixed by photosynthesis by vegetation covering this land surface according to the reaction 6CO2
Consider the gas phase reaction: 2SO2(g) + O2 (g) 2 SO3 (g). delta H°=-198 kJ/mol. a) How would you change temperature, pressure, and volume of the container to maximize production of SO3. Increase, decrease, or expect no effect
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