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What volume and mass of steam at 100C and 760.torr would release the same amount of energy as heat during condensation as65.5 cm3 of liquid water would release during freezing?
Why must compounds be spotted above the level of the development solvent in the develop- ing chamber
When heated, ammonium carbonate decomposes as follows. NH4CO2NH2(s) -> 2NH3(g)+CO2(g) At a certain temp, the equilibrium pressure of the system is 0.318 atm. Calculate Kp for the reaction.
aluminum has a face-centered cubic unit cell. if the atomic radius of aluminum is 125 pm what is the edge length of the
How many Micromoles of A- and HA are present in the solution. If you now add 3mL of 1M NaOH, will you still have a valid buffer
Draw 4 confirmations of 1,2 dibromoethane as newman projections in order of increasing energy
Hydrogen sulfide, H2S, is a toxic gas responsible for the odor of rotten eggs. The solubility of H 2 S (g) in water at STP is 0.195M. Explain what is the Henry's-law constant of H2S at 0°C
Calculate the OH concentration of a solution of Na2CrO4 0.225M. (the sodium salt of chromic acid). (Chromic acid is H2CrO4, a diprotic acid, Ka1= 1.80x10^-1, Ka2=3.20x10^-7 & Kw=1.00x10^-14).
explain why covalent bonds are formed when non metals from the right side of the periodic table bond with each other. Give two examples of such compounds.
If the aspirin crystals were not completely dried before the melting point was determined, what effect would this have on the observed melting point
Place the following complex numbers in a two-dimensional complex plane and find their absolute value lzl and phase angle arg
Calculate the concentration of OH- in a solution that contains 3.9 x 10 to the -4 M H30+ at 25 degrees C. Identify the solution as acidic, basic, or neutral.
An "empty" container is not really empty if it contains air. How many moles of nitrogen are in an "empty" two-liter cola bottle at atmospheric pressure and room temperature
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