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Problem- The composition of the atmosphere is approximately 80 per cent nitrogen and 20 per cent oxygen by mass. At what height above the surface of the Earth would the atmosphere become 90 per cent nitrogen and 10 per cent oxygen by mass? Assume that the temperature of the atmosphere is constant at 25oC. What is the pressure of the atmosphere at that height?
Give your respond in scientific notation please provide detail solution for good grades
Problem- Acetic acid has a Ka of 1.8x10^-5. Find [H3O+], [OH-], pH, and pOH for a 0.780 M acetic acid solution. The Uses of sodium phosphate include clarifying crude sugar, manufacturing paper, removing boiler scale, and washing concrete.
A 64 L sample of dry air is cooled from 137°C to -20.°C while the pressure is maintained at 2.85 atm. What is the final volume
Using the equation below assume we want to use 2.3 g of Fe(no3)3 in our experiment. how much NaOH will be needed for a complete reaction?
An aqueous solution contains the amino acid glycine. Assuming that the acid does not ionize in water, calculate the molality of the solution if it freezes at -1.1 degree centigrade.
The reaction will become more spontaneous. B) The spontaneity of the reaction will not change. C) The reaction will become less spontaneous. D) ?G will decrease. E) K will decrease.
Amount of H2O2 in 15.8 g of hair bleach was obtained by titration with a standard KMnO4 soln.
Find the velocity of an electron emitted by a metal whose threshold frequency is 2.32×1014 when it is exposed to visible light of wavelength 5.10×10?7
at 520 degrees celius the equlibruim mixture in a three cubic decimeter container consists of 0.2 moles of h2 and 0.2 mole i2 , if the equlibrium contant is o.016, calculate the concentration of hyrdogen iodide at equlibrium HI.
A hot-air dryer is used to reduce the moisture content of 1500kg/min of wet wood pulp from 0.75 kg H2O/kg dry pulp to 0.15wt% H2O. Air is drawn from the atomosphere at 28C, 760mm Hg, and 50% relative humidity, sent through a blower-heater, and the..
What mass of aluminum hydroxide can be made from 50 mL of 0.25M Al(NO3)3 and 100 ml of 0.1 M KOH
For a reaction a plot of ln k (rate constant) vs 1/T gave a line with y-intercept of 5.2. what is the value of the frequency factor for this reaction
The precipitated Hg was removed by filtration. The product was isloated by diethyl ether extraction. After drying over Na2SO4, solvent was removed and distillation gave the product.
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