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what is the difference between a 10% (v/v) methanol (CH3OH) solution and a 10%(m/m) methanol solution
Water at 0 degrees C was placed inside a vessel maintained at low pressure by a vacuum pump. After some of the water evaporated, the remainder froze. If 1.2g of water evaporated, how much ice was obtained? Use the heats of vaporization and fusion ..
How many moles of oxygen gas are required to completely react with 6.20 moles of carbon according to the balanced reaction equation shown below?
How would you prepare 1.0 ml of a 0.6 mg/ml protein sample from a 1.0 mg/ml protein stock solution in a given phosphate buffer? b) 1 ml of water and 1.0 ml of a solution "x" mixed together is a 1:2 dilution of "x" in water.
How about for a solution of nitric acid (which has pKa of -1.4) Do the calculation for a formal concentration. of 1M and for the formal concentration of 0.1M.
HF is a stronger acid than HBR because F has greater electronegativity than Br 2) the acid (HA) strength will increase when the H-A bond strength increases
for the reaction N2O4 (g) 2 NO2 (g) a 0.750 L flask contains an equilibrium mixture of 0.971 mol N2O4 and 0.0580 mol NO2 at 25 C. The system is allowed to expand into a larger flask with a total volume of 3.0 L.
a solution contains 4.00g NaOH, 5.61g KOH, and 1.03g RbOH in 90.0g of H2O. The solution has density of 1.08g/mL. What is the molality of OH?
The acid solution gives no precipitate when treated with 0.1 M AgNO3. Identify the components of the solid. EXPLAIN.
Calculate the wavelength of light emitted when each of the following transitions occur in the hydrogen atom. What type of electromagnetic radiation is emitted in each transition?
Three and one - third mol es of Cl2 (g) are now added , keeping P and T constant. Calculate the number of moles of Cl2 present when equilibrium is reestablished. Obtain also the ratio of the final to the original total volume.
what was the original total concentration of cesium and the corresponding radioactivity in Ci/L?
A 0.250 mol sample of argon gas has a volume of 9.00 L at a pressure of 875 mm Hg. What is the temperature (in celsius) of the gas?
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