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What mass of sucrose should be combined with 549 g of water to make a solution with an osmotic pressure of 9.00 atm at 280 K? (Assume the density of the solution to be equal to the density of the solvent.)
The pOH of a solution containing 0.30 M of a weak base is 3.92. What is Kb for the base
calculate the mass of one atom of helium atomic mass1.01 amu. calculate the wavelength of this atom if it is traveling
If a radiation source has an intensity of 700 rem at 2.00m, what distance is needed to decrease the intensity of exposure to below 25 rem
Calculate the theoretical yield for the bromination of both stilbenes and cinnamic acid, assuming the presence of excess pyridinium tribromide.
Draw a potential energy diagram for the rotation about the 3,4 carbon-carbon bond plotting potential energy versus torsion angle for 2-methylhexane
a naturally occurring element a exists in three forms of its isotopes a-28 27.977 amu 92.23 abundance a-29 28.976 amu
Find the entropy change of the system and of the surroundings if 3.000mole of water freezes reversibly at 1.000atm. the freezing temperature is 0.00C at this pressure, and the specific enthalpy change of fusion is equal to 79.7cal/gm at this tempe..
Which of the bonding forces from the list above would need to be overcome to convert CCl4 from a liquid to a gas? (Enter the letters in order of all that apply, e.g. AB, ABD, ACDE, etc.)
Determine the grams of sodium carbonate required to precipitate magnesium ions from water used in one wash cycle of a washing machine. Notes: 1) Assume the concentration of Mg+2 is 165mg/L 2) Estimate the volume of water used in your wash cycle 3)..
an inert gas has a volume of 941 ml at temperature 28 oC and pressure 675 Torr. What volume does the gas occupy at standard ambient temperature and pressure (SATP)?
Calculate the amount of heat liberated (in kJ) from 375 g of mercury when it cools from 89.2°C to 15.7°C
For the reaction: N2(g) + 2 O2(g) ? 2 NO2(g), Kc = 8.3 × 10-10 at 25°C. What is the concentration of N2 gas at equilibrium when the concentration of NO2 is twice the concentration of O2 gas.
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