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A sample of air contains 76.50% nitrogen, 22.70% oxygen, 0.05% carbon dioxide, and 0.75% argon, by volume. How many molecules of each gas are present in 1.00 L of the sample at 25°C and 1.00 atm?
N2?
O2?
CO2?
Ar?
Calculate the theoretical yield of when 114 g of C2H6 reacts with 206g of Cl2 , assuming that and react only to form and .
When separated from a water solution, CuSO4 forms a hydrate with 5 water molecules per formula unit. If 38 g of anhydrous CuSO4 are dissolved in water, what mass of the hydrate could be recovered from the solution?
Calculate the work done on a 2500. kg car in accelerating it from rest to a speed of 100. km/hr.
Sketch the reaction profile for an exothermic reaction of 25 kJ/mol with an activation energy of 55 kJ/mol. (Be sure to label the transition state on the diagram and include quantitative data.)
The concentration of Fe3+ ion at the beginning of an experiment was 0.03580 M. After 4.00 min, it was 0.02506 M. What is the average rate of reaction of FeCl3 in this time interval
when cooncentrated cacl2 aq is added to na2hpo4 aq a white ppt forms that is 38.7 ca by mass. write a net ionic
the empirical formula of a substance is bh3 the exper molar mass is 27.67 gmol. determine the molecular formula of the
Assuming that the rate of a chemical reaction doubles for every 10 celcius temperature increase, by which factor would a chemical reaction increase if the temperature were increased from
In its crystalline form, hemoglobin has a spherical shape with a radius of 2.75 nm. In aqueous solution, the hydrated radius of hemoglobin is found to be 3.55 nm. How many water molecules hydrate a hemoglobin molecule
Assuming that the total pressure of the gases is 1.52 and that their mole ratio is 94 : 4.0 : 1.5 : 0.50, calculate the partial pressure (in atmospheres) of each gas.
Assume the temperature of the mixture is chosen so that Kp=0.12. Predict the effect on the partial pressure of SO3 as equilibrium is achieved by using Q, the reaction quotient.
"The chains of several cell membrane - bound proteins are known to wind back and forth through the cell membrane, such that some parts of the protein structure are extracellular, some parts are intracellular, and some parts lie within the cell mem..
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