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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Calculate the final pressure of a sample of carbon dioxide (γ=1.40) that udergoes a reversible and adiabatic expansion from 57.4 kPa and 1.00L to the final volume of 2.00L.
If the densities of 20%, 50% and 70% solutions are 0.69 and 0.58 and 0.49 g/mL, respectively, and the denisty of the unknown solution is 0.50 g/mL, what is the approximate concentration of the unknown solution?
A sample of propane (C3H8) is placed in a closed vessel together with an amount of O2 that is 3.00 times the amount needed to completelyoxidize the propane to CO2 and H2O at constant temperature.
The fizz produced when an Alka-Seltzer® tablet is dissolved in water is due to the reaction between sodium bicarbonate (NaHCO3) and citric acid (H3C6H5O5):
Assuming 25 drops per milliliter, determine the initialmolar concentration of IO3- after the mixing but before anyreaction occurs (at time=0)?
A sample consisting of various gases contains 3.8×10-6 mole fraction of radon. This gas at a total pressure of 34 atm is shaken with water at 30C. Calculate the molar concentration of radon in the water.
Starting with initial concentrations of 0.400 M and .600 Mconcentrations of nitrogen and hydrgon respectively, the abovereaction is allowed to come to equilibrium
A postulated mechanism for the reaction2N2O5 (g) →4NO2 (g) + O2 (g) consists of the following three steps.Assuming this is the correct mechanism what would the rate lawfor this reaction be?
Terephthalic acid is an important chemical used in the manufacture of polyesters and plasticizers. It contains only C, H, and O. Combustion of 19.81 mg terephthalic acid produces 41.98 mg CO2 and 6.45 mg H2O.
A certain dry mixture contains only three compounds- silver nitrate, magnesium chloride, and barium nitrate. When 1.253 g of the mixture was added to excess water, 0.114 g of dry precipitate was recovered by filteration.
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