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Calculate the weight of benzene codistilled with each gram of water and the percentage composition of the vapor produced during a steam distillation. The boiling point of the mixture is 69.4 °C. The vapor pressure of water at 69.4°C is 227.7 mmHg.
When 1.50 mol of of CH4 reacts with excess Cl2 at a constant pressure according o the chemical equation, CH4 + 3CL2 2 CHCl3 + 3H2, and 1062 kL of heat are released. Calculate the value of ?H? for this reaction. ?H=?
A 50.0mL sample of 0.0240 M NH3(aq) is titrated with aqueous HCl. What is the pH after the addition of 15.0mL of 0.0600 M HCl(aq) kb of NH3= 1.8x10^-5.
How many grams of pyridine are there in 100 mL of an aqueous solution that has a pH of 9.00? The Kb for pyridine is 1.9x10^-9
Calculate the equilibrium concentration of H3O+ in the solution if the initial concentration of C6H5COOH is 7.0×10?2 .
for the next week keep a detailed purchase journal that includes what youve purchased and why. for each entry label the
You are the chief environmental officer of an industrial operation of your choosing. Describe your operation, its different components or stages, the materials used and the type of wastes generated.
hydrogen gas is produced when zinc reacts with sulfuric acid.zns h2so4aq rarr znso4aq h2gif 147 ml of wet h2 is
What is the number average degree of polymerization at the theoretical gel point which is predicted by the theory? (10 points) Hint: Use the regular definition of the number average degree of polymerization, ; x n (x n )t = Total # of structural u..
A farmer applies 1400.0 kg of a fertilizer that contains 10.0% nitrogen to his fields each year. 15.0% of the fertilizer washes into a river that flows through the farm.
Once you make a 100ml of 0.2M solution with 2.422 g of substance. If you take 10 ml of that solution you just made and add 90 ml of water and mix it. Then take 5 ml of the mixture and bring it to 25ml, what will be the concentration ofthe final so..
The first order decomposition of N2O5 at 328 K has a rate constant of 1.70 × 1083 s81. If the initial concentration of N2O5 is 2.88 M, what is the concentration of N2O5 after 12.5 minutes
The energy of a photon is 9.61 x 10 ^ -20 J . What is its wavelenght( in nanometers)? Enter your answer in scientific notation
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