How long does it take a person at rest to breathe
How long does it take a person at rest to breathe one mole of air if the person breathes 78.0 mL/s of air that is measured at 25 degrees Celcius and 755 mmHg?
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When we heat saturated calcium hydroxide, why must c are be taken so that the saturated calcium hydroxide solution does not boil orspit?
For a particular reaction, ΔH° is 20.1 kJ and ?S is 45.9 J/K. Assuming these values change very little with temperature, over what temperature range is the reaction spontaneous in the forward direction?
Assume that amolecule can adopt 10,000 distinct conformations. The energy of the ground state conformationis -4.0 kcal/mol, whereas the energies of the other 9,999conform ations are degenerate (each is -1.0kcal/mol).
An aluminum tank of volume 0.0300 m3 is filled to the top with mercury at 20.0 °C. The tank is placed inside a chamber with an interior temperature of 70.0 °C.
For analysis, a short peptide seven residues long is treated with FDNB, followed by complete acid hydrolysis and amino acid chromatography. What are the products of these steps?
A 52kg person is standing on a bathroom scale in an elevator moving upward. (a) If the scale reads 58kg, what is the magnitude of upward acceleration of the elevator?
Terephthalic acid, used in plastics manufacture, contains only C, H, and O. Combustion of 19.81 mg of terephthalic acid sample produces 41.98 mg CO2 and 6.45 mg H2O. What is the empirical formula for terephthalic acid?
When X rays of wavelength 0.124 nm are diffracted by a metallic crystal, the angle of first order diffraction (n=1) is measured to be 21.3o.
If the half reaction at an electrode is the reduction of zinc fromzinc 2+ ions, how many grams of zinc would be produced from passing a current of 0.5 amps for 2 hours.
Calculate the concentration of arsenic in ppb in a 0.05 mg/L solution. Assuming that the solution is entirely water and density of the solution is 1.0 g/mL.
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