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Isotonic saline solution, which has the same osomotic pressure as blood, can be prepared by dissolving 0.923 of in enough water to produce 100. of solution. What is the osmotic pressure of this solution at 25 ?
A hydrogen atom with an electron in its ground state interacts with a photon of light with a wavelength of 1.22 × 10^?6m. Could the electron make a transition from the ground state to a higher energy level? If it does make a transition,
if salt is used on icy roads in the winter to lower the freezing point of water to assist inmelting in theory what
in a reaction 2.04 g of vanadium is combined with 1.93 g of sulfur to give a pure compound. what is the empirical
A particular ball bearing has a mass of 85.0 grams. Calculate its diameter in cm. The density of this type of steel is 7.78 g/cm3
Our stock solutions are 0.2M EDTA, 0.04 M NaF and 1.2 M potassium phosphate. What volumes of the stock solutions should be measured?
Calculate the maximum yield of substance X that could be obtained if 10g of X were recrystallized from 50 mL of the solvent at the above conditions.
A special gas mixture used in bacterial growth chambers contains 1.00% by weight CO2 and 99.0% O2 . What is the partial pressure (in atmospheres) of each gas at a total pressure of 0.966atm
NH3 can react with BF3, forming NH3¾BF3. In this reaction, 1) NH3 acts as a Brønsted base, accepting a proton from the BF3 molecule. 2) NH3 acts as a Lewis base, donating a proton to the BF3 molecule
A compound's 13C NMR spectrum shows a resonance at 176 and 85 ppm. What possible structural subunit does the compound contain
Iit decomposes into Cl2 gas and SO2 gas. If 13.5g of SO2Cl2 is initially placed in a 2.20L container at 435K, calculate the concentration of SO2Cl2 at equilibrium. Kc=2.50 * 10^-3
Calculate the molar solubility of barium sulfate a) in water , b), in a solution containing 0.60 M of sodium sulfate.
Calculate the change in pH when 7.00 mL of 0.100 M HCl(aq) is added to 100.0 mL of a buffer solution that is 0.100 M in NH3(aq) and 0.100 M in NH4Cl(aq).
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