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Draw one eclipsed and one staggered conformation of 2,3-dimethylpentane using: Newman projections that sights down the C2-C3 bond, Sawhorse projections that sights down the C2-C3 bond, and Wedge-and-dash drawings where the C2-C3 bond is in the plane of the paper.
A system absorbs 192 kj of heat and the surroundings do 120 kj of work on the system. what is the change in internal energy of the system
A 25.00 mL sample of a sodium hypoclorite liquid bleach is placed in a 250 mL volumetric flask and diluted to the mark. A 25.00 mL aliquot of this solution is placed in a 250 mL Erlenmeyer flask.
A trainee in a medical lab will be released to work on her own results agree with those of an experienced worker at the 95% confidence level
How many grams of dry NH4Cl need to be added to 2.10 L of a 0.500 M solution of ammonia, NH3 , to prepare a buffer solution that has a pH of 8.76? Kb for ammonia is 1.8*10 ^-5.
The density of the hydrogen peroxide solution is 1.01 g/ml and the solution contains 3.40% H2O2 by mass. The vapor pressure of water at 24 celsius is 22mmHg. Based on this data and information calculate the molar volume at STP.
The air in a laboratory was measured with a barometer to be 7.40 x 100 to the 2 power mm Hg. What is the laboratory air pressure in atm?
A calorimeter temperature increased by 0.45 0C after adding 30 joule OF ENERGY TO IT BY ELECTRICAL HEATING and the temperature increased by 7.3 0C when 0.10 grams of HCl is neutralize in the same calorimeter now determine the specific heat of neut..
Tarnish (silver sulfide) may be removed from a silver spoon by placing the spoon in contact with a metallic container holding a solution of baking soda.
The density of methyl salicylate is 1.18 g/mL at 20 degrees Celsius. Determine the limiting reactant and explain why it is the limiting reactant.
Consider the cell described below. Al | Al3+ (1.00 M) || Pb2+ (1.00 M) | Pb Calculate the cell potential after the reaction has operated long enough for the [Al3+] to have changed by 0.32 mol/L. (Assume T = 25°C.)
It takes 49.0 J to raise the temperature of an 11.7 g piece of unknown metal from 13.0 C to 24.0 C. What is the specific heat for the metal?
If the initial concentration of cyclopropane is 0.150 M, what will the concentration of cyclopropane be after 22.0 hours? b) What is the half-life for the conversion process?
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