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The rate of effusion of NO2 gas during a pourous barrier is observed to be 2.88E-4 mol/h. In the same conditions, the rate of effusion of Ne gas would be how many mol/h?
What is the concentraion of toulene in this sample? Does this exceed the standard? (maximum contaminant level is 1.0 mg/L 6) How much calcium nitrate has to be added to 1000L of solution to provide 130ppm Ca^2+ if the water supply contains 40ppm Ca..
What is the concentration of OH- in a solution that contains 0.225g of NaOH in 0.250L of solutio.
What must be the velocity, in meters per second, of a beam of electrons if they are to display a de Broglie wavelength of 83.7 ?m?
A current is drawn from the cell until 2.20 g of silver have been deposited at the silver electrode. Calculate E for the cell at this stage of operation in volts.
Quantum dots are unique class of semiconductor because they are so small, ranging from 2-10 nanometers in diameter. The size of pencil lead in a mechanical pencil is 0.0197 inches.
What mass of silver bromide will form when 25.00 mL of a 0.0675 M MgBr2 solution is combined with 30.00 mL of 0.100M AgNO3
A 4.00 solution of was prepared using 1.00 of water at 25.0 . Once the solid had all dissolved, the temperature of the solution was 12.3 . Calculate the heat of solution, , of . Assume that the specific heat of the solution is identical to that of..
The two salts NaHPO4 and Na2HPO4 are used to make a buffer. Which one is the acid and which one is the base
After the reaction has reached equilibrium, the absorbance of the product C is measured and its concentration is determined to be 0.00745 M. Calculate the equilibrium constant for this reaction.
A saturated solution of potassium phosphate was filtered and then titrated. The concentration of [K+] was found to be 0.00956 M. What is the concentration of phosphate ions in this saturated solution
water and phenol are only partially miscible at temperature below 66.8oc. in a mixture prepare at 29.6oc from 50.0g
What are the required steps in the synthesis reaction of tert-butanol only using Ethanol (CH3CH2OH) and Methane (CH4)
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