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A 4.37 gram sample of a certain diatomic gas occupies a volume of 3.00 L at 1.00 atm and 45°C. What is the gas
Discuss the limitations upon cell size imparted by unfavorable changes in the surface area to volume (SA/V) ratioas cells have become larger in evolutionary time. How does the presence of a compar
The mole fraction of oxygen in air is .210. If the atmospheric pressure is .979 atm, what is the solubility of oxygen in air at 25.0 degrees C?
if the radio waves transmitted by a radio station have a frequency of 70.6 Mhz, what is the wavelength of the waves, in meters?
Will the temperature decrease shift the equilibrium toward the reactants or products for a reaction characterized by a positive reaction enthalpy and positive reaction entropy?
What other mechanisms would cause the differences in coleoptile length between light and dark grown seedlings, Speculate why stoma in the lower epidermis loss less water than those in the upper epider
Tartaric acid, which occurs in many fruits, has a molar mass of 150.1 g/mol and contains 63.96% oxygen by mass. How many oxygen atoms are in each tartaric acid molecules.
Calculate the ph at the equivalence point for titrating 0.170 solutions of each of the following bases with 0.170 M HBr.
Explain the difference between allopatricand sympatric speciation gene flow, reproductive isolation, genetic mutation, allele frequencies, and subpopulation. Finally, give a detailed example of how e
A carbon-hydrogen-oxygen containing compound yields 1.029 g CO2 and 0.198 g H2O in a combustion analysis( note that this means O2 was added the overall reaction) what is the empirical formula? if th
Direct reaction of sodium metal with O2(g) leads to sodium peroxide, Na2O2, which contains a peroxide complex anion and is diamagnetic. Direct reaction of potassium metal with O2(g) leads to potassi
Consider the titration of 30.0 ml of 0.048 M NH3 with 0.025 M HCI. Calculate the ph after the following volumes of titrant have been added.
State molecular geometries for the reactants and the product of the reaction of PF5 with the Lewis base NH3 (what adduct is formed?). Include geometry and formal charges in the structures. Also, wha
Calculate the pH at the equivalence point for the titration of 0.20 M HCl with 0.20 M NH3 (Kb = 1.8x10-5)
What molarity of aqueous magnesium chloride solution can be expected to show the same conductivity as 0.0075 M aluminum sulfate at 15,000 units.
In 1.00 atm of pure oxygen, the solubility of O2(g) in water is 1.26 x 10^-3 M at 25.0 degree C. The mole fraction of oxygen in air is 0.210. If the atmospheric pressure is 0.979 atm, what is the so
The molecular weight of a compound is the sum of the atomic mass of its atoms. Compound X has a molecular weight of 522 daltons and is known to consist of equal numbers of C, O, and H atoms
Calculate the change in ph when 6 ml of 0.1 M HCl is added to 100 ml of a buffer solution that is 0.1 M in NH3 and 0.1 M in NH4Cl.
Calculate the expansion work done against a constant external pressure of 0.999 atm and at a constant temperature of 24°C. Assume that the initial volume of dry ice is negligible and that CO2 be
Consider a diploid organism with 3 pairsof chromosomes (A, B and C from the mother and A', B'and C' from the father), What proportion of gametes would only have maternal chromosomes
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
A 20.00-mL sample of 0.150 M KOH is titrated with 0.125 M HCIO4 solution. Calculate the pH after the following volumes of acid have been added.
List a possible sequence of events and describe the energy transformations that take place between the sun's light hitting the earth and the light reaching you from an electric light bulb
As food manufacturers add vinegar to food preparations to make them tart, rather than pure acetic acid,
at 580 nm, the wavelength of its maximum absorption, the complex Fe(SCN)2+ has a molar absorptivity of 7.00 x 10^3 L mol -1cm1-. Calculate