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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
At a certain temperature the rate of effusion of helium is twice the rate of effusion of a gaseous X.X is a binary combination of carbon and hydrgen.
In the experiment aniline and acetic anhydride are reacted to form acetanilide, how do you calculate the theoretical yield of acetanilide?
A single crystal of a metal is oriented for a tensile test such that its slip plane normal makes an angle of 65.5° with the tensile axis. Three possible slip directions make angles of 30°, 48°, and 78° with the same tensile axis.
You are a hazmat responder and walk into what appears to be a meth lab. There are flasks of iodine, White Gas fuel, Sodium Hydroxide, Nitric Acid, and a box of ephidrine.
The combustion of an organic compound releases 35.6 kJ of energy and causes the temperature of a constant volume calorimeter to increase by 4.76 °C .
during exercise a person breathes in between 100 and 200 L of air er minute. if a person is exercising enough to breathe in an average of
Why might your sample not have the same melting range as either of the known compounds, given that it must be one of them?
Discuss two ways that ammonium compounds decompose when they are heated. What chemical reaction is involved in the thermal decomposition of ammonium persulfate?
Consider the titration of 50.0 mL of 0.217 M HN3 (Ka = 2.6 x 10-5) with 0.183 M NaOH. Calculate the pH of the solution after the addition of 29.6 mL of NaOH solution.
what is the formula for the ion formed when each of the following elements loses its valence electrons.
Which radioactive decay particle poses the greatest risk if it is external to the body? Why? 2- Which is safer, an isotope with a short half-life or one with a long half-life?
The bromocresolgreen end point of the titration was reached after the addition of 30.00 mL of hydrochloric acid solution. Calculate the concentration of the acid solution.
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