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two mwthods were described for determining the volume of the flask used for the molar mass determination. which method will give a more precise determination of the volume? why
A sample of an unknown gas effuses in 10.5 min. An equal volume of H2 in the same apparatus under the same conditions effuses in 2.07 min. What is the molar mass of the unknown gas?
Someday, cars may be powered by clean H2/O2 fuel cells and electric motors. Under standard conditions, such a fuel cell can develop 1.229 volts. If the oxygen is obtained from air (at P=0.21 bar), what pressure of H2 would be required to develop 1..
PH of Acetylsalicylic Acid, The active ingredient in aspirin is acetylsalicylic acid (HC9H7O4), a monoprotic acid with a Ka = 3.3x10-4
Calculate how many grams of Ni2+ are present in 3.36 moles of nickel(II) fluoride(NiF2) and also determine the number of moles of F- ion are present in 4.82 grams of nickel(II) fluoride.
The balloon rises to an altitude of 20,000 m, where atmospheric pressure is 55 mmHg and the temperature is 210 K. What is the volume of the balloon at 20,000m?
How do you determine the number of protons and neutrons in an atoms' nucleus and the number of electrons in its first and second shells?
A solution is prepared by mixing 3.9 g of FeCl3 with enough water to make 125.0 mL of solution. Calculate the molarity of the solution.
Suppose that 4387.0 J of heat energy is added to 8 g of ice initially at -11 C. (This could be done, for example, by electrical heating of ice in an insulated container.) What is the final temperature of the water
A compound is found to be 74.03% C, 8.70% H, and 17.27% N. The molar mass of the compound is 162.23 g/mol. Find the empirical formula and the molecular formula of the compound?
Write a mechanism for the reaction of an alkyl halide with alcoholic silver nitrate which depicts the type of substitution which occurs. Explains how this mechanism accounts for the relative rate of reactivity of 1°, 2°, and 3° halides in this rea..
What is the mass percent of sodium flouride solution prepared by dissolving 0.64moles of sodium fluoride into 63.5 grams of water?
Suppose that a student performing this experiment recorded the concentration of NaOH solution as 0.513 M, instead of the correct value of 0.531 M.
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