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a 51 kg person drinks 490. g of milk, which has a "caloric" value of approximately 3.0 kJ/g. If only 17% of the energy in milk is converted to mechanical work, how high (in meters) can the person climb based on this energy intake? The work done in ascending is given by mgh, where m is the mass (in kilograms), g the gravitational acceleration (9.8 m/s2), and h the height (in meters.)
The pressure of 9.0 L of an ideal gas in a flexible container is decreased to one-eighth of its original pressure, and its absolute temperature is decreased to one-forth of the original. What is the final volume of the gas?
How many grams of water are required to dissolve 24g od KNO3 at 100 degrees celsius?
What is the limiting reactant when 4.5 moles of aluminum react with 6.7 moles of oxygen gas? Unbalanced equation: Al + O2 → Al2O3
A solution of ammonia and water contains 4.20×10^25 water molecules and 6.90×10^24 ammonia molecules. How many total hydrogen atoms are in this solution?
what is the value of Kp for this reaction at this temp? what wold be the effect of an increase in pressure on the amount of SO_3 produced? what wold the effect of an increase in temp on the amount of SO_3 produced? (use relevant data from Appendix..
The isoelectric point (pI) of a peptide is the pH at which the peptide does not migrate in an electric field. Since the peptide is zwitterionic, there are the same number of positive charges as negative charges on the peptide population.
A hypothetical metal has a simple cubic unit cell and its atomic radius is 1.167 Å. Calculate the edge length of the unit cell. A hypothetical metal has a face-centered cubic unit cell and its atomic radius is 1.738
A block of materials has dimensions by 3.2 cm by 8.6 cm by 4.1 cm. Its mass is 632 g. What is the density? Answer in units of of g/cm ^3
A compound is 40.0%C, 6.70%H, and 53.3%O by mass. Assume that we have a 100.g sample of this compound. What are the subscripts in the empirical formula of this compound?
Calculate the energy that must be transferred as heat to a van der Waals gas that expands reversibly and isothermally from Vi to Vf.
Calculate the concentrations of all species in a 1.75 M Na2SO3 (sodium sulfite) solution. The ionization constants for sulfurous acid are Ka1 = 1.4× 10-2 and Ka2 = 6.3× 10-8.
Reduce the production of hazardous waste and encourage recycling and reuse of hazardous materials by charging producers a tax or fee for each unit of waste generated.
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