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Why does the addition of NaCL to the aqeous layer sometimes help to break up an emulsion that forms in an extraction?
What Amount of enrgy has been transferred to heat the water? (The specific heat capacity of water is 4.184 J/g *C )
if you wanted to prepare a solution of co in water at 25 in which the co concentration was 2.1 mm what pressure of co
How many liters of the antifreeze ethylene glycol would you add to a car radiator containing 6.50 L of water if the coldest winter temperature is -28.0 degrees Celsius? Calculate the boiling point of this water-ethylene glycol mixture.
If a radiation source has an intensity of 650 rem at 1.0 m, what distance is needed to decrease the intensity of expo- sure to below 25 rem, the level at which no effects are detectable
A sample of gas occupies 250 mL at STP. What is the temperature if the gas expands to 1500 mL at a pressure of 0.500 atm?
Calculate the energy difference (E) for the transition from n = 1 to n = 4 energy levels of hydrogen per 1 mol of H atoms.
Tris base (pka =8.1 ; ka = 8.32 e-9) was dissolved in 0.5l of water to give the final concentration of 1 M. a.) find pH of the obtained solution. b.) how much does the pH change after addition of 1 ml of 10N HCl?
hydrogen gas has a henrys constant of 7.8 x 10-4 molkg . bar 25 degrees celcius when dissolving in water. if the
when a pure solvent freezes the temperature remains constant till all liquid is frozen thus the freezing point. when
A 145 g aluminum cylinder is removed from a liquid nitrogen bath, where it has been cooled to -196° C. The cylinder is immediately placed in an insulated cup containing 226 g of water at 15.0° C,
consider the following reaction and associated equilibrium constantaag --gt bbg kc3.1find the equilibrium
If a reaction vessel contains 50.0 of carbon dioxide and 25.0g lithium hydroxide what mass of lithium carbonate can be produced?
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