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What is the change in internal energy (in J) of a system that absorbs 0.330 kJ of heat from its surrounding and has 0.586 kcal of work done on it? in scientific notation.
draw the lewis dot structures for the following molecules:
A mixture consists of 323 mg of methane, 165 mg of argon, and 223 mg of nitrogen. The partial pressure of nitrogen at 275 k is 19 kPa.
Explain why if benzoic acid were substituted for 2-methoxyphenylacetic acid in this experiment the enantiomeric ratio of the yeast reduction product could not be determined by 1 H NMR.
A specific steroid has max = 291 nm and molar absorptivity = 11,500. What is the concentration of the compound in a solution whose absorbance at 291 nm is A = 0.050 with a sample pathlength of 1.00 cm
The I2 that did not react with ascorbic acid is then determined in a thiosulfate reaction. If 40.0mL of 0.4445M I2 was added to a sample containing vitamin C, the unused I2 required 19.05mL of 0.142M S2O32- to react. How many moles of vitamin C we..
The Ka for cacodylic acid (C2H7AsO2) is 5.37 x 10-7. An amount (0.1035 g) of this compound is added to 0.5 L H2O. What is the resulting pH of this solution
An acetate buffer has a pH of 4.40. Which of the following changes will cause the pH to decrease?
C4H10O with boiling points of A (117.5) B(82.9) C (34.6) D (99.5) The liquid likely to have the highest vapor pressure at 25 degrees Celsius is? the intermolecular attractive forces of these are likely to be ordered? what structural isomer is most..
To whats volume in liters must 105 mL of hydrochloric acid containing 47.5g of HCl be diluted to make a 1.05M solution ?
Write out two net ionic equations for the reaction of hydrochloric acid with carbonate to form bicarbonate and the reaction of hydrochloric acid
How many moles of O2 are needed to burn 1.05 mol of C8H18
A balloon equipped with a UV spectrometer was flown in the stratosphere to measure the [O_3] at an altitude of 25 km. The spectrometer had an absorbtion path length of b= 1000.0 m and measured a transmittance of T = 0.6952. Determine the concentr..
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