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What volume of 0.250 M Na3PO4 is required to precipitate all the lead(II) ions from 140.0 mL of 0.750 M Pb(NO3)2?
Cortisol ( M=362.47g/mol); Corisol is 69.6% C, 8.34% H, 22.1% O by mass. What are the empirical and molecular formula?
a 45.5g sample of copper at 99.8 celsius is dropped into a beaker containing 151 g of water at 18.5 celsius. what is
Calculate the grams of solute needed to prepare each of the following solution. 5.5L of a 0.60M KCI solution.
Use the ion-electron method to balance each of the redox reactions
Calculate ΔE for a system undergoing an endothermic process in which 15.6kJ of heat flows and where 1.4kJ of work is done on the system.
Consider the following system which has been shown to be spontaneous at 298K and select the true statement below. the ?S for the system is predicted to be negative, so therefore the ?S for the surroundings must be positive to a greater extent so tha..
a/ The PCL3 (g) initial pressure is 2.00 atm and the initial pressure for Cl2(g) is 1,00 atm. determine the pressure at equilibrium for each gas. PCL3(g) + Cl2(g) OCL5(g) Kc=1.19
Calculate the sample of concentration. Is this an appropriate concentration for 1H NMR, 13C NMR or both?
Identify the group of elements that corresponds to the following generalized electron configuration: [noble gas]ns^2(n-2)f^6?
Suppose that the atomic mass unit (amu) had been defined as one-twentieth of the average mass of an atom of lithium instead of one-twelfth of the mass of an atom of carbon-12. What would the average atomic mass of calcium be on this new scale
What is the concentration (in M) of the nitrate ion when 18.4 mL of a 0.744 M solution of sodium nitrate is combined with 15.9 mL of a 0.734 M solution of copper(II) nitrate? Assume the volumes are additive.
What volume (in mL) of an 8% w/v acetic acid solution would be needed to form 2.2 L of carbon dioxide gas at 25.2 degrees Celsius and 0.9982 atm? Assume the acid is reacted with excess sodium bicarbonate, and round your final answer to two sig fig..
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