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Presume that 4.258 g of K2Cr2O7 (MW=294.18 g/mol) is dissolved in enough water to make 550mL of solution.
A) Compute the concentration of K+ ions
B) If 15mL of the original K2Cr2O7 solution is transferred to a flask and diluted to 85mL explain what is the concentration of the new solution?
What is the molar mass of a compound if 5.96g of the compound dissolved in 25g of chloroform solvent has a boiling point change of 4.80 c. The boiling point constant for chloroform is 3.63 c/m.
explain why there are significant color changes that occur insubstitution reactions. talk about the origins of color
suggest an helpful technique that might be use to conclude total ca2 in a sample of blood. recommend a next process
What is the pH of a solution obtained by mixing 50mL of 0.02 M sodium acetate with 40mL of 0.01 M HCl.
You are provided a neutral (pH 7.0) aqueous solution of citric acid, caffeine, and triethyl amine. Provide a flow chart for how you would isolate pure caffeine from this mixture using, calcium carbonate, dichloromethane, sodium sulfate(drying), an..
What is the role of sodium sulfite? How does it work? Please use an equation to explain this. Why was the work-up step so important in this experiment? What can be found in the top layer, and the bottom layer in the extraction step?
Using condensed electron configurations and Lewis electron-dot symbols to depict the monatomic ions formed from each of the following reactants, predict the formula of the compound the ions produce. N and Mg
C3H8 + 5O2 reacts to yield 3CO2 + 4H2O +488 kJ What is the heat released if 2.5 moles of C3H8 reacts completely with oxygen?
A solution of salt (molar mass 90 g mol -1) in water has a density of 1.29 g/mL. The concentration of the salt is 35% by mass.
A compound of carbon and hydrogen contains 80% carbon by mass. What is the mole ratio of carbon to hydrogen in this compound
Which bronsted-lowry acid is not considered to be a strong acid in water. A)H I B)H Br C)H2S O3 D)H NO3
Bearing in mind the Jahn-Teller theorem, rank the following compounds in terms of their degree of deviation from idealized octahedral structure- [Cr(CN)6]4-, [Cu(H2O)6]2+, and [Cr(H20)6]3+
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