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Quantitative Chemical Analysis Question:
Assume that a single biological cell contains 150 femtomol of epinephrine. Also armed with the knowledge that each cell has 2.5x104 tiny compartments called vesicles and that each vesicle can be regarded as approximately spherical in shape with a radius of 200 nm. Compute the mean (average) molar concentration of the chemical in each vesicle.
After the reaction was completed. The solution was back titrated with a NaOH solution (33.50 mL of 0.1500 M).Calculated the Molecular Mass of MCO3. Determine what is this sample: CaCO3 ; MgCO3; or BaCO3 ?
A collapsing star is estimated to have a mass of 1.0 x 1024 kg and a volume of 4.35m^3. Compute the density of the star in grams per milliliter.
If solvent evaporates during an experiment, what effect, if any would this have on the freezing point determined for the pure solvent and or the solution. b.) If the solute dissociated about 10% what effect, if any would this have on the freezing ..
Critical Thinking - Philosophy
chloride solution and it turned out to be 8.35g, what is the percentage composition of the iron (III) chloride solution?
when 2.74 g of Ba(s) reacts with O2(g) at 298 K and 1 atm to form BaO(s), 11,100 J of heat is released. what is the delta H of formation for BaO(s) in kJ/mol?
Explain the following observations in terms of shifting equilibria by Le Chatelier's Principle. Write the equation for the equilibrium involved in each case.
Calculate the molar solubility of Fe(OH)2 in a buffer solution where the pH has been fixed at the indicated values. Ksp = 7.9 x 10-16. (a) pH 7.5 M (b) pH 10.1 M (c) pH 12.0 M
Estimate the average spacing between water molecules in liquid water by making use of 2 pieces of information: (a) liquid water has a density of 1 g/cm^3
Problem- Reaction of 3-methyl-1-butene with Mercuric Acetate in Methanol followed by NaBH4 yields 100% Product A while reaction of the same alkene with Methanol in sulfuric acid yields 50% Product A and 50% Product B. Products A and B are constitu..
The seal can however be broken by the use of force such as using a hammer. In the unlikely event that someone in your vicinity takes a hammer to the smoke detector, how can you protect everyone from radiation?
How much heat must be applied to a 18.3 g sample of iron (s=0.449J/(g x *C) in order to raise its temperature from 23.8*C to 356.6*C
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