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You are preparing solutions in the laboratory. Instead of using solutes and solvents, you have pre-prepared stock solutions available. You need 250.0 mL of a 0.850 M solution of C2H6O(aq), and your stock solution is 1.50 M C2H6O(aq). How many milliliters of the stock solution will you need to start with for this dilution?
1. what mass of kclo3 will produce 48.00 g of o2 if the decomposition of kclo3 is complete? the answer is 122.5 can you
Explain a vitamin tablet was dissolved in a 500mL flask. 50mL of this solution was transferred to a 100mL flask as well as filled to the line. Explain how many mg of Fe are in the tablet if the concentration of Fe is 2.83 g/mL in the 100 mL flask
Sodium metal is also readily oxidized by oxygen. If the product of the reaction were dissolved in water, what would be the color of the litmus for a litmus test. Explain.
Calculate the binding energy per nucleon (in J) for 2H and 3H. The atomic masses are 2.014102 u for 2H, and 3.016049 u for 3H.
100.0mL of a K2HPO4 solution is titrated with 0.1187M NaOH. The endpoint is reached when 115.4mL of OH- has been added. Find out the mass of K2HPO4 dissolved in the original 100.0 mL H2O as well as the pH of the solution at the end point of the ti..
he endpoint of the titration was 9.98mL. Calculate the percent copper in the solid sample.
For a 5.0 gram sample of each of the following, what weight of water will be lost if the sample is heated to constant weight: CoCl?*9H?O; CuSO?*5H?O; ZnSO?*4H?O; BaCl?*2H?O.
A hypothetical molecule, X-Y, has a dipole moment of 1.90 D and a bond length of 169 pm. Calculate the percent ionic character of this molecule.
Aluminum metal is formed by the electrolysis of Al2O3 in molten cryolite. How many grams of Al are produced when 6.50 x 10^3 C pass through the cell
benzene ring with a 2 carbonyl joined by an O in the middle and a iso propal group is on the other carbonyl. (would be a symmetric anhydride if it weren't for the benzene and isop-ropral substituents on the two carbonyls)
For an acid-base reaction, what is the reacting species in barium hydroxide
When a 60.0 g sample of a metal at 100.0oC is added to 45.0 g of water at 22.00 oC, the final temperature of both the water and metal is 32.81 oC. The specific heat of water is 4.184 J/g·K. What is the specific heat of the metal
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