What is the freezing point in the given solutions
What is the freezing point in (C) the solutions below? For water, Kf=1.86 (Ckg)/mol. The vapor pressure of water at 45.0 C is 71.93mm Hg.
1. A solution of 12.5 g of urea, CH4N2O, in 135 g of water at 45 C.
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Find the adiabatic flame temperature in the complete combustion of propane (C3H8) entering at 2.5 bars and 25 C with air entering at 1 bar and 220 C. Please presume all the gases are ideal and look up any molar enthalpies of formation as necessary
Methanol burns in oxygen to form carbon dioxide and water. Calculate Delta H rxn at 25 . = kj ?? 2) calculate Delta S rxn at 25 degree c = j/k?? 3) delta G at 25 degree C = ? kj?? 4) spontaneous
A beaker with 170 mL of an acetic acid buffer with a pH of 5.000 is sitting on a benchtop. The total molarity of acid and conjugate base in this buffer is 0.100 M. A student adds 8.70 mL of a 0.370 M HCl solution to the beaker. How much will the p
The effective nuclear charge tends to decrease from left to right across any period of the periodic table. 3.Electrons in the 2s orbital feel a greater attraction to the nucleus than the 2p electrons and are therefore lower in energy. 4. Valence e
A titration is performed on 1.3245g of a sample of a diprotic acid that is dissolved in 50 ml of water. if 44.10 ml of .6124 M NaOH is required to reach the end-point, what is the molecular weight of the diprotic acid?
The oxidation number of Cr changes during the reaction from ____ to ___. Because of this change, chromium is reduced/oxidized (circle one). The oxidation number of the alcoholic carbon changes from ___ to ___. Because of this change, the carbon is
If you have 1 gram of (-) ethyl lactate and purify it with an enantiomeric excess of 85% yields, wihout any loss of material. How many grams of the (+) enantiomer were separated?
Calculate the change in entropy (in J/K) when a 44.0 g of nitrogen gas is heated at a constant pressure of 1.50 atm from 19.3 ºC to 86.5 ºC.
How many kilojoules of heat are absorbed when 40.6 of mgo is decomposed into mg and O2 at constant pressure
For the following battery: Cd(s) | CdCl2(aq) || Cl-(aq) | Cl2(l) | C(s) (a) Write the reduction half-reaction occuring at the C(s) electrode. (Include physical states of reactants and products.)
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