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What is the madelung constant? Why can the same Madelung constant be used for seemingly different substances?
Consider that there is 26.38 g NaCl in a solution that has a total volume of 1,780 mL with a density of 0.8495 g/mL. A) What is the molarity of NaCl B) What is the mass/mass % C) What is the molality
Draw the resonance structures for 9-(hydroxymethyl)anthracene. Is it possible for all three rings to simultaneously have benzenoid character
The pKb values for the dibasic base B are pKb1 = 2.1 and pKb2 = 7.8. Calculate the pH at each of the following points in the titration of 50.0 mL of a 0.60 M B(aq) with 0.60 M HCl(aq).
The following reactions occur at 500 K. Arrange them in order of increasing tendency to proceed to completion (least ? greatest tendency). 1. 2NOCl 2NO + Cl2 Kp
An acid-base equilibrium system is created by disolving 0.10 mol HF in water to a volume of 1.0 L. What is teh effect of adding 0.050 mole F-(aq) to this solution
After doing some analysis, the probe determines that the gas pocket contains an element that has an ionization energy of I= 1350 kJ/mol and an electron affinity of EA=32.0 kJ/mol . What is the identity of this element.
Given the reaction 2Al(s) + 3H2SO4(aq) --> Al2(SO4)3 (aq) + 3H2(g) what volume of H2 gas measured at STP will be produced from 5.40 grams of Al reacting with an excess of H2SO4
Have you ever wondered about how a frost-free refrigerator remains, well, frost-free? The key is sublimation During certain times, the freezer compartment is warmed slightly
A solution is made by dissolving 0.040 moles of the weak acid HA in water to make 1.00 L of a solution whose pH is 4.90. Calculate the Ka for the acid.
A 40.0 mL sample of 0.150 M Ba(OH)2 is titrated with 0.400 M HNO3. Calculate the pH after the addition of the following volumes of acid.
A solid that weighs 0.008kg . Put the solid into a gradulated cyliner filled with water and the volume increases by 10cm 3 what is the denity?
If 9.57 moles of an ideal gas has a pressure of 2.81 atm, and a volume of 25.49 L, what is the temperature of the sample in degrees of Celsius
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