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A gas expands and does P-V work on the surroundings equal to 313 J. At the same time, it absorbs 135 J of heat from the surroundings. Calculate the change in energy of the gas.
A 2.00-g sample of a large biomolecule was dissolved in 19.0 g of carbon tetrachloride. The boiling point of this solution was determined to be 77.85°C. Calculate the molar mass of the biomolecule.
How many moles of Na2SO3 were added to the calorimeter cup if 40.0mL 0.50 M NaOCl and 60.0mL 0.50 M Na2SO3 were combined?
A 643 mL gas sample at STP is compressed to a volume of 285 mL, and the temperature is increased to 26C. What is the new pressure of the gas in Pa? Answer in units of Pa.
Calculate the number of moles and the number of grams of the indicated solutes present in each of the following solution samples.
Consider the malate dehydrogenase reaction from the citric acid cycle. Given the following concentrations, calculate the free energy change for this reaction at 37.0 °C (310 K). ?G°\' for the reaction is 29.7 kJ/mol.
the lower state was the ground state and the upper state was the first excited state for the flame tests of each metal atom you observed,
Protein Quantification Explain why necessity for one or two plots will depend on the absorption response of the instrument and not on your standard concentrations alone.In other words,why would your results of your concentration calculation be the..
What is the mole fraction of solute and the molal concentration for an aqueous solution
Find the total pressure for a mixture that contains four gases with partial pressures of 5.38 kPa, 4.52 kPa, 3.16 kPa, and 1.23 kPa.
A 130 mL stock solution contains 1.3 M Na3PO4. When 10 mL of the stock solution is diluted to 21 mL, what will the concentration of Na+ ions be?
Calculate the intermolecular collision frequency and the mean free path in a sample of helium gas with a volume of 5.0 L at 27 degrees Celsius and 3.0 atm.
Consider two DNA molecules: one 400 base pairs long, the other 800 base pairs long. Assuming that each is a rigid rod of diameter 25 Å, with a length of 3.4 Å per base pai.
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