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Changing 1 mol of Mg(s) and 1/2 mol of O2 (g) to gaseous atoms requires a total of approximately 150kJ of energy. The first and second ionization energies of Mg are 737kJ/mol and 1450kJ/mol respectively. The first and second electron affinities of Oxygen are -141KJ/mol and +844 kJ/mol respectively. The stardard hear of formation ofMgO(s) is -602kJ/mol. Calculate the Lattice Energy of magnesium oxide based on the above given information. (enter the sign and numerical answer without units. Include 4 significant digits in your answer, do not use scientific notation)
A 290 mL stock solution contains 2.3 M Ca(CN)2. When 100 mL of the stock solution is diluted to 125 mL, how many moles of CN- ions will be contained in the dilute solution
State the advantage and disadvantage of a furnace compared with a flame in atomic absorption spectroscopy
given the reaction ca 2h2o caoh2 h2what is the total number of moles of ca needed to react completely with 4.0 moles
How much heat is lost when 12.55 g of zinc vapor at 907 degrees celsius is cooled to 425 degrees celsius
Calculate the pH of a 0.047 M solution of carbonic acid H2CO3. The Ka1 of carbonic acid = 2.6 x 10-7 and the Ka2 of carbonic acid = 5.6 x 10-11 what is the easiest way someone can explain this
For the straight line defined by the points (4, 57) and (6, 91), determine the slope and y-intercept. Do not round the answers.
Construct a graph pH versus titrant volume, mark on your graph where the indicator color changes were observed. Compute the first derivative for each data point. Within + 1 ml of the equivalence volume. Based on the graph estimate the equivalence vol..
The unit celll of copper (Cu) is a face-centered cube that has an edge lenth of 3.62 A (note: 1A=1*10^-10 m). Determine the volume occupied by one mole of copper atoms, interms of mL/mol.
The initial mass of a radioisotope is 10.0g. If the radioisotope has a half-life of 2.75 years, how much remains after four half-lives?
If it takes 4.67 times as long for a particular gas to effuse as it takes hydrogen under the same conditions, what is the molecular mass of the gas?
How much time is required to produce 200g of aluminum metal from molten aluminum oxide dissolved in cryolite, if you use a 12amp current
Zinc metal reacts with yellow crystals of sulfur in a fiery reaction to produce a white powder of zinc sulfide. A chemist determines that 65.4 g of zinc reacts with 32.1 g of sulfur. How many grams of zinc sulfide could be produced from 12.0 g of ..
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