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What will be the final temperature of a mixture made from 25.0 g of water at 15.0 degrees C, 45.0 g of water at 50.0 degrees C, and 15.0 g of water at 37.0 degrees C?
What mass of sodium chloride, NaCl, is needed to make 389. g of a 3.89%(m/m) NaCl solution? (atomic masses: Na = 22.99, Cl = 35.45)
2NaN3(s)--> 2Na(s) + 3N2(g) How many grams of sodium azide are required to produce 19.00L of N2 at 273K and 775mmHg. A) 34.9 B) 52.0 C) 2.66*10^4 D) 3.89*10^5 E) 5.80*10^5
Describe how a linear sequence of amino acids gives rise to the three-dimensional structure of proteins. Detail the significance of this structure, how it may be modified, and the results of such modification
A 2.983 gram sample containing an unknown amount of arsenic trichloride and the rest inerts was dissolved into a NaHCO3 and HCl aqueous solution. To this solution was added 1.910 grams of KI and 50.00 mL of a 0.00894 M KIO3 solution. The excess I3..
Consider the following endothermic reaction at Equlibrium; 2 H20(l) 2H2(g)+O2(g) if .5 mol water is added what will happen and why
give one piece of experimental evidence that more than 1 mole of particles is formed when 1 mole of a salt dissolves in
30.0 mL of 0.10 M Ca(NO3)2 and 15.0 mL of 0.20 M Na3PO4 solutions are mixed. After the reaction is complete, which of these ions has the lowest concentration in the final solution. (A) Na+ (B) NO3- (C) Ca2+ (D) PO43- answer is C. WHY.
Did an experiment where we extracted the caffeine in 1 bag of tea. We added the bag of tea leaves to the solution where the sodium carbonate solution. Explain what the purpose of adding the sodium carbonate was.
Decide whether or not each of the following metals dissolves in 1M HCl. For these metals that do dissolve, write a balanced redox reaction showing what happens when the metal dissolves
Calculate the change in enthalpy for the CHCl3 sample and change in entropy for the CHCl3 sample. Finally, Calculate the change in entropy for the reserve and change entropy of the universe.
Based on your knowledge of explain how MO diagrams are constructed for the 2nd row diatomics, construct and MO diagram for Cl2. That Indicate all atomic orbitals and molecular orbitals as well as molecular orbitals for both the core and valence el..
The data in the table at the right show a calibration curve for the determination of RNA from its absorbance at 260 nm. Use a spreadsheet and the least-squares method to determine the slope and intercept of the best straight line fit to the calibr..
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