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the electric potential energy associated with an electron and a proton is -4.35*10^-18 j. what is the distance between these two charges?
What are he experimental conditions of T and P that will be used to calculate the mass of air in the flask? B) Calculate the density of air at the experimental conditons identified in part A
A steam turbine receives a flow of 10,000 lb of steam per hour and delivers 500 kW in that period. Heat losses from the casing and the turbine bearings may be assumed neglible
sodium hydroxide do you need to add to the volumetric flask before you dilute the solution to volume with distilled water?
In this experiment a hot metal block at 100oC is added to cold water in a calorimeter. The heat lost by the metal block equals the heat gained by the water and the two end up at the same temperature.
For the reaction Cl2 + 2KBr -> 2KCl + Br2, calculate the percentage yield if 200 g of chlorine react with excess potassium bromide to produce 410 g of bromine
Buffer solution Problem to determine pH, Determine the pH after the addition of 10.0ml of 0.1M NaOH to 100.00ml of this buffer. An aqueous solution of 100.0ml 0.100M NaCl is titrated with 0.100M AgNO3 (AgCl Ksp= 1.0x10^-10) pAg=-log[Ag+]
Calculate the mass of propylene glycol that must be added to 0.360 of water to reduce the vapor pressure by 2.88 torr at 40°C (Pressure of H2O is 55.3 torr at 40°C ).
Ultra-high-vacuum experiments are routinely performed at a total pressure of 1.0x10^-10 torr. Calculate the mean free path of N2 molecules at 350K
Calculate the work (in kJ) when 3.00 moles of hydrogen gas are produced from the reaction of sodium in excess water at 298 K:
The vapor pressure of pure CH2Cl2 (with molecular weight 85 g/mol) is 133 torr at 0?C and the vapor pressure of pure CH2Br2 (with molecular weight 174 g/mol) is 11 torr at the same temperature.
"A student titrated a 10 mL sample of a saturated solution of borax. If the titration required 23.95 mL of 0.2556 M HCL to reach the endpoint, calculate the equilibrium molar concentration of B4O5(OH)(4 in the saturated solution"
Calculate the minimum chloride ion concentration needed to initiate precipitation of PbCl2 from a solution that contains 0.01M Pb^2+ (aq).
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