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Which generally comes first in solving problems, hypothesis or experiment? What is the difference between a law and a theory? What does the controversy over the "face" on Mars illustrate?
what is the percent Zn in the mixture? (At the same temperature and pressure, the Mg/HCl reaction gave 24.2 L gas/mol Mg.)
Problem- Suppose you have just added 200.0 ml of a solution containing 0.5000 moles of acetic acid per liter to 100.0 ml of 0.5000 M NaOH. What is the final pH? The Ka of acetic acid is 1.77 x 10-5.
What is the chlorine flow rate at the reactor pressure and temperature. If the etching rate of silicon is 0.50min, and the wafer is 300 mm in diameter, how many moles of silicon are etched per hour
Calculate the pH of a solution formed by mixing 100.0 mL of 0.20 M HClO with 200.0 mL of 0.30 M KClO. The Ka for HClO is 2.9 × 10-8.
The rate constant for the first order decomposition of SO2Cl2 is 1.37 x 10^-3 min-1 at a certain temperature. If the concentration is initially 0.500 M, predict it after 300 min.
Does doubling the decibels of a sound intensity level double the intensity? Explain. Why is lightning seen before thunder is heard? Under what circumstances would sound have (a) a Doppler "blueshift" and (b) a Doppler "redshift"?
10.0 moles of NH3 and 10.0 moles of H2 are introduced into a 2.00 L flask. At equilibrium, 3.0 moles of NH3 gas remain. Calculate Kc for this reaction.
the diameter of a neutral helium atom is about 1x10 pm.suppose that we could line up helium atoms side by side in
Identify all of the substances that are used or produced in this experiment A5. Distinguish between elements and compounds.
What is the molarity of a solution prepared by dissolving 5.72 grams of NaOH in 43.8 ml of solution. What is the balanced equation for the reaction of sodium hydroxide with sulfuric acid. How many ml of 0.101 M H2SO4 solution would be required to ..
A reaction is carried out in a constant pressure calorimeter. Appropriate measurements are taken as well as the energy for the change is calculated. The amount of heat exchanged under these conditions leads to the computation of which state functi..
Write out a complete reaction mechanism for the synthesis of the 1,2-diphenyl-1,2-ethanediol acetal from 1,2-diphenyl-1,2-ethanediol and 2,2-dimethoxypropane in the presence of acid
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