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Problem- Calculate the change in internal energy of the following system: a balloon is cooled by removing 0.659kJ of heat. It shrinks on cooling, and the atmosphere does 389Jof work on the balloon.
Calculate the change in internal energy of the following system: a 100.0-g bar of gold is heated from 25 ?C to 50 ?C during which it absorbs 322 J of heat. Assume the volume of the gold bar remains constant.
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Suppose the pH inside the inner mitochondrial membrane is 0.75 units higher than outside the membrane and ?f = fout - fin = -0.168V. Calculate the electrochemical potential difference between protons inside versus outside the membrane.
Which of the following choices is insoluble? Imagine that and are cations and , , and are anions, and that the following reactions occur: Which of the following choices is insoluble? AX AY AZ BX BY BZ
When 13.0 g of the mixture is dissolved in enough water to make 500. mL of solution, the solution exhibits an osmotic pressure of 6.85 atm at 25°C. Determine the mass percentage of NaCl in the mixture.
Before electrolysis begins, bromthymol blue indicator solution is added to the colorless solution and the color is adjusted to green (neutral). Predict the colors that will result at each electrode and support these predictions with anode and cath..
What is the maximum number of electrons that could be ejected from this metal by a burst of light (at some other frequency) with a total energy of 1.06× 10-7 J?
How many ATOMS of xenon are present in 3.25 moles of xenon trioxide. How many MOLES of oxygen are present in 9.37E+22 molecules of xenon trioxide
If 34.29 mL of an EDTA solution is required to react with 0.1879 G of MgCl2, what is the molarity of EDTA.
A cool solution of sodium nitrite and a solution of the amine in an ice bath. Moderately concentrated hydrochloric acid is added.
Imagine that it is a very hot summer day outside. To help quench your thirst while outdoors, you decide to make yourself a big batch of ice tea. When you add large quantity of sugar to the tea to sweeten it, you notice that where the sugar lands o..
if a temperature increase from 20.0deg.c to 36.0deg.ctriples the rate constant for a reaction what is the value of the
Calculate the concentration of ALL species in a 0.25 M solution of ethylammonium chloride (EtNH4Cl). The Kb value for the weak base ethylamine (EtNH2) is 5.6 x 10
a 0.335 m string is clamped at both ends. if the lowest standing wave frequency in the string is 326 hz what is the
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