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Problem- A student carrying out an experiment was in a hurry to finish. he decided to omit the centrifugal step, although the solution was cloudy. should this cause a higher or lower result in the determination of the percent of copper in a brass sample? Higher percent or lower percent? Explain.
Please illustrate work if possible thanks
The concentration of sulfuric acid in the lead-storage battery of an automobile over a period of time has decreased from 38.0 percent by mass (density = 1.29 g/mL) to 26.0 percent by mass (1.19 g/mL). Assume the volume of the acid remains constant..
An electron is confined to a one-dimensional box of length L. It falls from the second energy level to the ground state, and releases a photon with a wavelength of 322 nm. What is the length of the box?
Problem- A sample of gas occupies a volume of 74.8 mL. As it expands, it does 116.3 J of work on its surroundings at a constant pressure of 783 torr. What is the final volume of the gas
A student who suspected he had a carbonyl compound for an unknown dissolved his solid unknown compound in acetone and the solution was analyzed by IR
Toluene (C7H8) and nitric acid (HNO3) are used in the production of trinitrotoluene (TNT, C7H5N3O6) an explosive. C7H8 + HNO3 --> C7H5N3O6 + H2O (not blanced)
Question- Using the provided data, Determine the temperatures at which the following hypothetical reaction will be nonspontaneous.
Question- After the system below reaches equilibrium at 472 o C, it is found t hat the mixture consists of 7.42 atm H 2, 2.53 atm N 2, and 0.160 atm NH 3. From these data, calculate K p and K c for the reaction at this temperature.
Determine steady-state conditions for one dimensional conduction in a plane wall having a thermal conductivity of 50 W/mK as well as a thickness L=0.25m from T1 = 50ºC to T2 = -20ºC. Find out the head flux.
the teaching assistants did this experiment last week. they started with 5.872g piece of copper wire. after drying the
Assuming that the deformation is completely elastic, compute the amount of stress that is put on the nickel 200 alloy. Use values of Yield Stress, Ultimate Tensile Strength, Coefficient of Thermal Expansion and E for nickel 200 alloy.
Compute the pH of a buffer solution prepared by dissolving a 0.20 mole of cyanic acid (HCNO) as well as 0.80 mole of sodium cyanate(NaCNO) in enough water to make 1.0 liter of solution Ka(HCNO)=2.0*10-4
A particular reactant decomposes with a half-life of 115 s when its initial concentration is 0.353 M. The same reactant decomposes with a half-life of 225 s when its initial concentration is 0.180 M.
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