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Number of exhaled moleculesTotal mass of the atmosphere is equivalent to that in a layer 7 kilometer deep with density equal to the density at the surface. Assuming that air is uniformly mixed, how many molecules of air you have exhaled in the last 20 years will be inhaled in a single breath?
Given:Earth's surface area=5.11*10^9 square kilometersVolume at a layer 7 kilometer deep=3.58*10^19 m^3Volume of air 1 breath equates to 500 cm^3Volume breathed in 20 years=1.05*10^5 m^3Assume normal conditions (25 degrees C, 1atm, 24L/mole)Avogadro number 6.02E23 molecules/mole
C2H5OH(l) + C3H7COOH(l) C3H7COOC2H5(l) + H2O(l) Determine the mass of ethyl butanoate produced if 3.30 mol of ethanol is used.
Determine the mass of carbon dioxide (in g) produced from the complete combustion of 1.40×10-2 g of C6H10 with excess oxygen.
Carbonate buffers are significant in regulating PH of blood at 7.40. Calculate the concentration of Carbon dioxide in a 0.200M NaHCO3 at PH=7.40.
What is the molar mass of this substance, express your answer in g/mol and determine the moloar concentraitions Cr 2 O 7 ^2 and of K + ?
PCl5 + 4H2O > 5HCl +H3PO4. How many total moles of acid are formed when starting with 4.5 g of PCl5 and excess H2O.
How many grams of solute are needed to prepare 500.0 mL of a 0.375 M CH3OH solution.
A flask contains 0.350 grams of liquid Br( bromine). calculate the number of (Br)bromine molecules present in the flask
The average pH of precipitation in rural areas is 5.80. Assuming that the pH is controlled by the carbonate system, i.e., no anthropogenic acid gases are present in the atmosphere.
A zero-order reaction has a constant rate of 1.00×10-4 . If after 80.0 seconds the concentration has dropped to 6.50×10-2 , what was the initial concentration.
The water level in a graduated cylinder initially at 210 rises to 277 after a piece of lead is submerged. What is the mass in grams of the lead.
In a titration of 25.80 mLs of 0.256 M HCOOH (formic acid, Ka = 1.8x10-4) with 0.286 M KOH, how many mLs of titrant will be required to reach the equivalence point?
Calculate the work done on a 2500. kg car in accelerating it from rest to a speed of 100. km/hr.
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