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Write an equation for the reaction that takes place between hydrobromic acid, HBr, and ethylamine, C2H5NH2, when aqueous solutions of the two are mixed. Write the product in ionized form, but the reactants in molecular form.
When 4.0 g of sulfur is burnt in excess oxygen, 40 KJ of heat is evolved. What is the enthalpy change for the combustion of sulfur?
The boiling points of HCl and CO2 are nearly the same (-85 degrees C and -78 degrees C). Explain why CO2 can be removed from an aqueous solution by boiling briefly while essentially no HCl is lost even after boiling for one hour or more
the volume of NaOH needed to neutralize it and repeats the process several times to determine the concentration of the NaOH solution. She calculates the concentration and uncertainty in the concentration of the NaOH from the titration data.
If a sample of barium contains 2.3 x 1023 atoms of barium, how many grams of barium are in the sample?
Explain why lattice energy calculations based on the born mayer equation reproduce the experimentally determined values to within 1 percent for LiCl but only 10 percent for AgCl given that both compounds have the rock salt structure
Determine the molecular formula of the oxide of phosphorous when it is in its gaseous state.
Find concentration of each ion present in the solution formed by mixing: 44.0 mL of 0.150M Na2SO4 and 25.0 mL of 0.200M KCl.
good primary standard for aqueous acid-base titrations. Calculate the mass, in grams, of KHP needed to produce 250. mL of a 1.50 M solution of KHP.
Nitric oxide, sometimes used in the treatment of lung disease in premature children, is provided to the healthcare professionals as a solution of NO in nitrogen.
an aqueous antifreeze solution is 48.5 ethylene glycol c2h6o2 by mass. the density of the solution is 1.062
Define a genetic mutation and state the type of genetic mutation. Discuss the effects of genetics mutation
a gaseous mixture of o2 and kr has a density of 1.184 gl at 385 torr and 300. k. what is the mole percent o2 in the
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