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A 100-W lightbulb is placed in a cylinder equipped with a moveable piston. The lightbulb is turned on for 0.02 hours as well as the assembly expands from an initial volume of .80 Liters to a final volume of 5.9 Liters against an external pressure of 1.0 atm. Utilize the wattage of the lightbulb and the time it is on to compute the ΔE in joules (assume that the cylinder and lightbulb assembly is the system and assume 2 significant figures.) Calculate w and q.
How does the first ionization energies change as you go from left to right across the periods; explain what causes the trend to fluctuate
Ammonia reacts with oxygen according tot he following equation: 4NH3+5O2=4NO+6H2O deltaHrxn = -906kJ Calculate the heat (in kJ) associated with the complete reaction of 155g of NH3.
given the reaction 4als 3o2g --gt 2al2o3s what is the minimum number of moles of oxygen gas required to produce 1.00
Calculate the sodium ion concentration in a solution formed by diluting 35 ml of a .585 M sodium phosphate solution to a final volume of 145ml
What mass of Mg is formed by passing a current of 5.50 A through molten MgCl2 for 2.80 days?
An unknown liquid boiling around 185 +/_ 5 degrees C in 5% HCl and in a pH 5.5 buffer but is insoluble in water. Shaking the unknown with p-touluenesulfonyl chloride in aqueous NaOH produces a white precipitate that doesn't dissolve in dilute HCl...
Write and balance the full chemical equation for the reaction between lithium bromide and silver (I) nitrate. (2) How much 0.235 M lithium bromide solution
What is the formula of a compound that crystallizes with copper ions occupying one-half of the tetrahedral holes in a FCC array of fluoride ions
If you look at a reaction equation for an esterification reaction, you cannot tell where the oxygen comes from (acid or alcohol). Knowing the mechanism of this reaction, devise an experiment using O18, to help prove unequivocally where the oxygen ..
Consider the titration of 25.0 mL of a 0.723 M HCl solution with a 0.273 M KOH solution. Calculate the hydrogen ion concentration before any titrant, KOH solution, is added.
What is the density in g/L of a gas mixture that contains 27% F2 and 73% He by volume at 714 mm Hg and 27.5 C.
A year later a single large crystal of mass 50 g is at the bottom of the flask. Explain how this experiment provides evidence for a dynamic equilibrium between the saturated solution and the undissolved solute.
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