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Does a chemical reaction occur when a metal ion is placed in a flame and a color occurs? Explain. What is the difference between emission and absorption in spectroscopy?
a weather baloon is filled with 195.0 L of He and launched from sea level. The baloon is designed to continue its ascent to an altitude of 30 km. If the atmospheric pressure at 30 km is 28.0 torr and temp is 41 C, what is the volume of the baloon ..
if you started a ride with ice packs that held 1300 g of frozen water at 0 rmcircc and the temperature of the water at
Calculate the molarity, percent composition by weight, and mole fraction of HCL in an aqueous solution 12 M HCl that has a density of 1.20 g/mL.
Which of the available reagent(s), if any, will oxidize Fe(s) while leaving Cu(s) unreacted? If none of the available reagents can be used for this purpose, then identify another reagent from the table that could be used. For each reagent you've i..
Given that the initial rate constant is 0.0130s^-1 at an initial temperature of 20 degree celcius , what would the rate constant be at a temperature of 100 degree celcius
Silver has two naturally-occurring isotopes with masses of 106.905092 amu and 108.904756 amu. What are the percent abundances of each isotope, respectively?
the hydrocarbon contains 93.75 carbon and 6.25 hydrogen. calculate its empirical formula.from your empirical formula
A mixture of KBr and NaBr weighing 0.560 gm was treated with aqueous Ag+ and all the bromide ion was recovered as 0.970 gm of pure AgBr. What was the fraction by weight of Kbr in the original sample?
A molecular compound is dissolved in water at 25 C such that its mole fraction ,X, is 0.225. what is the vapor pressure of the resulting solution if the vapor pressure of pure water is 23.8 torr at 25 C
A galvanic (voltaic) cell consists of an electrode composed of zinc in a 1.0 M zinc ion solution and another electrode composed of copper in a 1.0 M copper(I) ion solution, connected by a salt bridge. Calculate the standard potential for this cell..
The basic Salt sodium acetate, CH3COONa, is completely soluble in water. What is the pOH of a 0.25 M solution of sodium acetate?
How many GRAMS of zinc iodide are present in 1.56 moles of this compound? and explain to me how to find it
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