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A gas expands and does 82.7 J of work on the surroundings. At the same time, the gas loses 103 J of energy to the surroundings as heat.
What is the change in the internal energy of the gas?
Would this be ΔE = q + w (-103) + (82.7) = -20.3. I get confused with the positive and negative charges.
In performing TLC to test the purity of aspirin acetaminophan and caffeine, Explain how will using a vey polar solvent affect the movement of the spots on your plate
At 25 °C, water has an equilibrium vapor pressure of 23.8 mm Hg. If 2.500 g of water is sealed in an evacuated 10.0-L flask and heated to 25 °C, what mass of water will evaporate?
PI3Cl2 is a nonpolar molecule. Based on this information, determine the I-P-I bond angle, the Cl-P-Cl bond angle, and the I-P-Cl bond angle.
Problem- The equation of line determined from a Beer's Law plot is y = 0.195x + 0.4. What is the concentration of an unknown water sample if the assumed resistance is 650 ohms
what is the work in joules done on the system to compress he gas from 24.0 l to 12.5 l against a pressure of 1.5 atm at
urea at 25c are 0.605 atm and 0.245 amt respectively. calculate the van't hoff factor for the CaCl2.
Which statement is not true about fission? Answer a. process requires initiation by a neutron b. products have smaller nuclei than reactants c. combination of atomic nuclei d. critical mass produces a chain reaction
but did not exactly add 4.0 mL. Instead he added 4.50mL. What was the final concentration of her standardized solution in ppm?
Define calorimetry and provide an example of its use. Include calculations.
Explain the physical interactions of the molecules that lead to proteins falling out of solution in high salt. What is the driving force of protein precipitation?
What is the energy of a C-C bond in kJ/mole? Explain. How does this amount of energy compare?
Benzyl alcohol was selected by a student to crystallize fluorenol because the solubility characteristics of this solvent are appropriate. however, this solvent is not a good choice. Explain
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