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Use the following data to calculate the enthalpy of solution, DeltaH soln for sodium hydroxide, NaOH:
DeltaH(Lattice)= -425.9 kj/molDeltaH(Hydration)= -469.2 kj/mol
Choose the element with more negative (more exothermic) electron affinity from each of the following pairs.
160j of work has done by an expanding gas on its surroundings at a constant pressure 1.01 atm. determine the final
Draw the Lewis Structure and make a rough three-dimensional sketch of each species.
A mixture of aluminum and zinc weighing 1.67g was completely dissolved in acid to give 1.69L of hydrogen gas measure at STP. What is the weight of aluminum in the original mixture
Ascorbic acid (Vitamin C, H2C6H6O6) is a diprotic acid. In a laboratory exercise, a vitamin C tablet was analyzed by titration using 0.125 M NaOH(aq). On the average, it required 29.5 mL of the base to neutralize the acid in the one tablet. How ma..
Atoms contain protons. 2)Nuclei move out of the paths of the alpha particles. 3)Neutrons have zero charge.
The boiling point of water is about 200 degrees Celcius higher than one would predict from the boiling points of hydrogen sulfide and hydrogen selenide. One may explain this apparent anomaly by which of the following?
59.0 ml of a 1.50 m solution is diluted to a volume of 278 ml. a 139-ml portion of that solution is diluted using 147
What is being asked? Using the values of the effective molar absorptivities you determined from your slopes and the values of the absorption you obtained for the mixture at the spectral maxima of 434 nm and 618 nm
Identify the unknown gas - Find the molecular formula of the compound
Sea-level atmospheric pressure is approximately 14.7 pounds per square inch. From this fact, we can deduce that a column of air one square inch in cross-section, measured from sea level to the top of the atmosphere, would weigh approximately 14.7 ..
how many molecules of carbon dioxide are produced when 132 molecules of acetylene hcch to react in excess oxygen
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