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The stock solution of methyl orange is colored and has a concentration of 100 ppm. Your job is to use the stock solution to prepare 4 solutions with concentrations of 10 ppm, 5 ppm 2.5 ppm and 1.0 ppm. Describe how you would make these four solutions and show all calculations.
to find Sorxn and determine if the reaction is spontaneous at 900oC.(2 pts). 2NH3(g) + 3CuO(s) %u2192 3H2O(l) + N2(g) + 3Cu(s)
The absorption spectra of ions have been used to identify the presence of the elements in the atmospheres of the sun and other stars. What is the wavelength of light (in nm) that is absorbed by He+ ions
Liquid pentane (C5H12) has a density of 0.6262 g/mL at 20°C. Find the true mass (mtrue) of pentane when the mass weighed in air is 12.580 g. Assume the air density is 0.0012 g/mL and the balance weight density is 8.4 g/mL.
A0.4324 g sample of a potassium hydroxide-lithium hydroxide mixture requires 28.28 ml of 0.3520 M HCl for its titration to the equivalence point. What is the mass percent lithium hydroxide in this mixture?
What is the molality of lauryl alcohol in a solution of 17.1g lauryl alcohol dissovled in 185g ethanol, C2H5OH?
Explain in your own words what consitutes a buffer solution. Then explain how this solution resists changes in pH when strong acids or strong bases are added to it.
Based on activation energies and energy changes and assuming that all collision factors are the same, answer the following questions: Which of the following reactions would be fastest in the forward direction
ICE Problem: Calculate Final Concentrations, Phosgene, COCl2 (g), is an extremely toxic gas. It was used during World War I. Today it is used to manufacture pesticides, pharmaceuticals, dyes, and polymers. It is prepared by mixing carbon monoxide ..
The decay of radioactive elements follows first-order kinetics. Therefore, the rate of decay can be described by the same integrated rate equations and half-life equations that are used to describe the rate of first-order chemical reactions.
Report each to three significant figures in scientific notation. Given this data for the decomposition of urea in an acidic solution, calculate each of the following assuming Arrhenius behavior.
what is the value of Kp for this reaction at this temp? what wold be the effect of an increase in pressure on the amount of SO_3 produced? what wold the effect of an increase in temp on the amount of SO_3 produced? (use relevant data from Appendix..
The balloon ascends to an altitude of 20 , where the pressure is 76.0 and the temperature is 50. . What is the new volume, , of the balloon in liters, assuming it doesn't break or leak
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