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A 265- flask contains pure helium at a pressure of 760 . A second flask with a volume of 495 contains pure argon at a pressure of 729. If the two flasks are connected through a stopcock and the stopcock is opened, what is the partial pressure of helium?
The values of the specific rotation, [alpha]20D, for the alpha and beta anomers of D-galactose are 150.7 and 52.8 degrees, respectively. A mixture that is 20% of alpha-D-galactose and 80% beta-D-galactose is dissolved in water at 20 degrees C.
That a supercooled gas eventually phase separates is consistent with the 2nd Law of Thermodynamics because the phase separation lowers the Helmholtz free energy of the system
also why are the energy minimization bond angles not the same as the ideal bond angles?
For the following reactants, predict the products formed (if any) and write the balanced molecular equation, complete ionic equation and net ionic equation. NaHSO3(aq)+HI(aq)
A 350.0 g sample of copper is initially at 25.0 °C. It absorbs 12.50 kJ of heat from its surroundings. What is its final temperature, to the nearest tenth of a degree?
containing helium gas at a pressure of 31.1 atm is used to fill a weather balloon in order to lift equipment into the stratosphere. To what maximum pressure (in atm) could a 151 L balloon be filled.
42 kg of graphite is added to 1 metric ton of iron and the mixture is heated to 1300 then slowly cooled to room temperature. Calculate the mass of each microstructure and the mass and composition of each phase within each microstructure at the fol..
determin the rate for the reaction. (B) how long would it take for 25% of the reactant to decompose?
How many calories are needed to raise the temperature of 525g of beryllium from 21.0 celsius to 375 celsius?
In a hot flame, the emission intensities of the Sodium lines at 589 and 589.6nm are greater in a sample solution that contains KCl then when this compound is absent
Dehydration of 2-methylcyclohexanol gives small amounts of 1-ethyl-cyclopentene. Write a mechanism to account for this product.
Remember that M1V1=M2V2. What volume of distilled water do you need to add to dilute 10 mL of a 100 mM Tris- HCl buffer solution to a concentration of 10 mM
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