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When a 5.60 g sample of solid sodium hydroxide dissolves in 100.0 g of water in a coffee-cup calorimeter, the temperature rises from 22.3 degrees Celsius to 41.6 degrees Celcius. Calculate delta H in kJ/mol for the solution process if the specific heat capacity of the solution is 4.18 J/g*K.
NaOH(s)=Na+(aq)+OH-(aq)
A gas mixture with a total pressure of 770 contains each of the following gases at the indicated partial pressures: , 265 ; , 134 ; and , 159 . The mixture also contains helium gas. What is the partial pressure of the helium gas?
A gaseous reaction occurs at a constant pressure of 30.0 atm and releases 58.0 kJ of heat. Before the reaction, the volume of the system was 9.00 L.
A tank is first evacuated, and then connected to a 75.0 L cylinder of compressed nitrogen gas. The gas pressure in the cylinder, originally at 15.8 atm, falls to 1.05 atm without a change in temperature. What is the volume of the tank?
What can we expect to be a few key differences between a jelly roll motif and an up and down barrel
the atomic mass of chlorine is listed as 35.454 amu on the periodic table. it has two naturally occurring isotopes, Cl-35 and Cl-37. what are the approximate percentages of each?
What is the free Zn2+ concentration if 0.020 M Zn2+ solution is mixed with an equal volume of 2.0 M NH3? Kf for [Zn(NH3)4]2+ is 4.1 × 10^8
Calculate the pH during the titration of 20.00 mL of 0.1000 M hydrazine N2H4(aq), with 0.1000 M HCl after 20.25 mL of the acid have been added. Kb of hydrazine = 1.7 x 10-6
If 0.600 gram of zinc is used, what is the amount of zinc chloride that is produced in the above reaction?
If the mass of the Co(NO3)2*6H20 obtained to prepare the stock solution had been more than the mass that you recorded would the concentration of the unknowns have been too high
What is the mass change (in grams) accompanying the formation of CO and H2 in the water gas reaction?
If you measure the refractive indices of two liquids and they are within 0.0001 units from eachother, how likely is it that the two liquids are identical
What is the silver ion concentration in a solution prepared by mixing 461 mL of 0.366 M silver nitrate with 425 mL of 0.545 M sodium chromate
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