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Calculate a lattice energy for (in kilojoules per mole) using the following information:
for = -72.8 for = +589.8 for = +1145 Heat of sublimation for = +178.2 Bond dissociation energy for = +435.9 Net energy change for the formation of from its elements = -186.2
Write a balanced equation for each of the two steps of the reaction, namely: (1) the reaction between benzyltriphenylphosphonium chloride and sodium hydroxide
Determine what would you use to prepare 10 ml of 0.2M CaCl 2 from the 20M stock solution and find out which solution is with pH > 7, but is not an Arrhenius base in the strict sense?
An oxygen tank contains oxygen at a pressure of 70 kPa. When the pressure drops to 36 kPa, the temperature increases from 300 K to 350 K. If the initial volume is 9 L, what is the final volume?
how many grams of lithium bromide must be added to 35 grams of water to make a solution
In the complex ion [ML6]n+, Mn+ has seven d electrons and L is a weak field ligand. According to crystal field theory, the magnetic properties of the complex ion correspond to how many unpaired electrons?
Assume that the aluminum atoms can be represented as spheres, as shown in the drawing (Part C figure) . If each {rm Al} atom has a radius of 1.43 {rm AA}, what is the length of a side of the unit cell?
The mass spectrum of an organic compound shows the relative abundances of M to be 85.12% and M+1 to be 0.9206%. Assuming the peaks are caused by C-12 and C-13 isotopes
Determine number of moles of oxygen molecules are in the cylinder and compute the mass of solid C 2 H 3 NaO 2 required mixing with 60.0mL of .125M C 2 H 4 O 2 to form a ph 4.20 buffer?
How many grams of O2 will dissolve in 1.75L of H2O that is in contact with air where partial pressure of O2 is 0.209atm?
what is the molar mass of the acid? If the standardization of the NaOH solution, why is it important to rinse the wet pipet with small portions of the standard oxalic acid solution
what is the pH of a solution prepared by mixing 25 mL of 0.10 M methylamine with 25 mL of 0.10 M methylammonium chloride?assume that the volume of the solutions are additive and that Kb = 3.7 x 10^-4 for methylamine
The increase in volume is due to the H2 gas created. 50 g of tin (Sn) is 0.421 moles. That is also the number of moles of H2 that are created. Use tha ideal gas law to compute the added volume due to that gas.
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