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An unknown compound A, has a melting point 123 degreesC-124 degreesC. It is thought that Z is either B(reported 122 degreesC) or C(reported mp 125 degrees C. which compound (B or C) is most likely to be Z and why is that?
All chemical reactions, spontaneous and non spontaneous require an energy "push" in the form of energy of activation. why is the reaction called spontaneous if energy is required to start the reaction
Write the structure for the organic reagents and products, name the products and indicate stereochemistry when appropriate
A green leaf has a surface area of 2.00 cm^2. If solar radiation is 1030 W/m^2, how many photons strike the leaf every second? Assume three significant figures and an average wavelength of 504 nm for solar radiation.
Calculate the expected change in temperature for 1.7 g of NH4NO3 dissolved in 50.0 mL of H2O. Assume that the calorimeter absorbs no heat.
The central atom has 4 electron domains. d) The central atom has 5 electron domains. e) The central atom has 2 electron domains.
nitrogen gas was collected over water at a temperature of 40 degrees C, and the pressure of the sample was measured at .796 mmHg. if the vapor pressure of water at 40 degrees C is 55 mmHg, what is the partial pressure of the nitrogen gas?
Is it true that Ksp is an equilibrium constant that can be used to express quantitatively the extent to which a compound dissolves
how many grams of Ni(OH)2 are produced from the reaction of 35.0 mL of a 1.75 M NaOH solution ans excess NiCl2? c)what is the molarity of 30.0 mL of a NiCl2 solution if this volume of solution reacts completely with 10.0 mL of a .250 M NaOH soluti..
If the vapor pressure of the pure liquids at 20.0deg C are 227 torrand 31.7 torr respectively, what will be the total vapor pressure of the mixture? Also, what will be the mole fraction of each compound in the vapor?
Calculate the molar solubility of AgBr in a 1.00 M aqueous solution of ammonia. Then calculate the solubility of AgBr in pure water, and compare the two solubilities. (Ksp for silver bromide is 7.7x10^-13 and Kf for Ag(NH3)2+ is 1.6x10^7)
How do you think the use of quantitative methods related to these advantages and disadvantages? 2. How do forecast practitioners rank various forecasting models applied to any given problem? Which technique is used most often in practice and why?
What is the M concentration in octanol? (b) pH= 8.00 what is the M concentration in water? what is the M concentration in octanol?
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