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In the average adult male, the residual volume (RV) of the lungs, the volume of air remaining after exhalation, is 1200 mL.
a) How many moles of air are present in the RV at 1.0 atm and 37oC? b) How many molecules of gas are present under these conditions?
In the laboratory you dissolve 16.7 g of barium chloride in a volumetric flask and add water to a total volume of 125 mL. What is the molarity of the solution
An unknown, rectangular substance measures 3.6 cm high, 4.21 cm long, and 1.17 cm wide. If the mass is 21.3g, what is this substance's density?
Write the balanced equation for the yeast using glucose to produce energy, ethanol and carbon dioxide.
Commercial concentrated aqueous ammonia is 28% NH3 by mass and has a density of 0.90 g/ml . What is molarity?
Suppose you have just added 200.0 ml of a solution containing 0.5000 moles of acetic acid per liter to 100.0 ml of 0.5000 M NaOH. What is the final pH? The Ka of acetic acid is 1.77 x 10^-5
How much 5.90 M NaOh must be added to 590.0mL of a butter that is 0.190 m acetic acid and 0.0260 m sodium acetate to raise the pH
A 1.45 g sample of an iron ore is dissolved in acid and the iron obtained is (aq). To titrate the solution, 21.6 mL of 0.102 M KMnO4(aq) is required. What is the percent of iron in the ore? Hint: calculate moles of iron then mass of iron then % ir..
Write down the full Hamiltonian for a He atom moving freely in space, i.e., there is no external potential. b) Now assume there is no repulsion between the electrons
Determine the chemical formulas for a covalent compound whose molecules contain 2 carbon atoms, 6 hydrogen atoms and an oxygen atom
Why must you avoid using your hands in handling the magnesium ribbon and the crucible and cover? 2.Why must objects be cooled to room temperature before taking their weights(masses)
How many grams of CO2 can be produced by the reaction of 35.5 grams of C2H2 and 45.9 grams of O2? Please help with the balancing the equation
At 2000 degrees celcius the equiblibrium constant for the reaction 2NO to N2 and O2 is Kc = 2.4 x 103. If the initial concentration of NO is 0.200M, what are the equilibrium concentrations of NO, N2, and O?x?
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