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Gold is a very conductive and ductile metal. One gram of gold can be pulled into a wire 2 km long. The density of gold is 19.3 g/cm3 and the melting point is 1337.3 K. What is the diameter of this gold wire?
Three particles have the same electron configuration. One is a cation of an alkali metal, one is an anion of the halide in the third period, and the third is an atom of a noble gas. What are the identities of the three particles
The molar heart of neutralization from hydrochloric acid and sodium hydroxide is -57.3 kJ/mol. Use this accepted value to predict the heat evolved during the neutralization of 655mL of 1.00 M hydrochloric acid by 1.00 M sodium hydroxide
calculate the total volume of gases that can be collected at 1.2 atm and 293 k from 260 grams of nitroglycerin 4
it is given ab2 a 2b- a 0.07 m b- 0.09 m and pk 6.75 standard enthalpies of formation acetic and ab2 - 25.65 kcal
Consider the reaction when aqueous solutions of sodium sulfide and manganese(II) sulfate are combined.
From the data below, calculate the standard entropy change for the following reaction at 25oC: CaCl2(s) ---> Ca(s) + Cl2(g). Compound H (kJ/mol) So(J/mol-K)
the reaction of potassium in water is extremely exothermic, what would be the problem with adding a large piece of potassium to a small amount of water?
It is known that the peptide linkage in proteins and peptides is planar and restricted rotation about the carbon-nitrogen bond. Explain why this is true. figure yo support your answer.
Calculate the freezing point of a 0.08500 m aqueous solution of NaNO3. The molal freezing point depression constant of water 1.86 degrees C/m.
A certain atom has a threefold degenerate ground level, a non-degenerate electronically excited level at 3500 cm1, and a threefold degenerate level at 4700 cm?1. Calculate the partition function of these electronic states at 1900 K
Write a balanced equation for each of the two steps of the reaction, namely: (1) the reaction between benzyltriphenylphosphonium chloride and sodium hydroxide
NO+ and NO- are also known. Compare the bond orders of these ions with the bond order of NO. Which of the three would you predict to have the shortest bond? Why?
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