Rate as a Function of Temperature: The 2 Point Arrhenius Equation

1. When the temperature is changed from 25°C to 46.3°C, the reaction rate doubles. What is the Activation Energy (Ea) in kJ/mol for this reaction?

2. A first order reaction has a half life of 45.0 minutes at 30.0°C. What is the half life (in minutes) when the reaction is heated to 61.0°C? The activation energy for this reaction is 107.0 kJ/mol.

E. Identification of Unknown

From your test results, identify your unknown as a saturated (alkane) or unsaturated (alkene)

hydrocarbon. Give your reasoning. If the names of the possible compounds are known, write

their names and condensed structural formulas.

Explain your conclusion:

Can you pleased help me with any possible ideas, by writting names and condensed structural formulas, as also need to indicate if its alkane or alkene, and if possible a short conclussion

Biochem Lab: Explain the basis for the stacking gel portion of a polyacrylamide gel. Describe how it works with respect to the loaded protein samples as well as the running buffer components.

Find the second virial coefficient for the Dieterici equation of state

p = (RT/V-b) exp (-a/RTV)

Discussion about: Chemistry and Health

Smog is the pollution of the atmosphere over large cities with a mixture of nitrogen Oxide (NO, NO2) gases and Ozone (O3) gas. These gases are produced by burning gasoline in the internal combustion engines of our cars. Suggest a solution(s) to reduce the emission of these gases to the atmosphere.

Please make sure to type it.

what is the handbook value of the concentration of calcium carbonate in hot water?

Use critical temperature and pressure for oxygen gas to determine critical molar volume assuming
a) ideal gas  L/mole
b) van der Waals gas  L/mole
c) Redlich-Kwong gas  L/mole

Sally chemist is attempting to determine the mass % of acetic acid in vinegar. Below is an excerpt from her lab book:

A. Prepared vinegar analyte

25.0 mL vinegar

mass of vinegar 25.20 grams

added 75.0 mL H₂O

added 2 drops phenolphthalein

temperature: 27.0 ^oC

manufacturer's mass % acetic acid = 3.5 %

B. Prepared burette

filled with standardized NaOH solution 0.201 M

C. Titration

initial burette reading: 5.12 mL

final burette reading: 78.67 mL

solution is light pink

1. What is the density of her vinegar samlpe?

2. Use the manufacturers reported mass % acetic acid to estimate how many moles of acetic acid are present in her analyte.

3. Use your result from 2 to estimate how many mL of standardized NaOH solution she will need to reach the equivalence point.

4. Use Sally's data to calculate the molarity of acetic acid in her vinegar sample.

5 Use the results from 4 to calculate the mass % of acetic acid in Sally's vinegar sample.

what is the molarity concentration of lead cation in a saturated solution of lead sulfate? Ksp(PbSO4)= 6.3x10^-7 and what is the solubility of PbSO4 in g/ml?

show clear equations and answers

A 2.892 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 1.850 grams of KI and 50.00 mL of a 0.00937 M KIO3 solution. The excess I3

Calculate the adiabatic flame temperature for the following mixtures initially at 298 K: stoichiometric butane-air mixture, stoichiometric butane-oxygen mixture, 2.0% (by volume) of butane in air. Calculate without the restriction on the possible products using an online version of the CEA calculator developed by NASA and located athttp://www.grc.nasa.gov/WWW/CEAWeb/ceaHome.htm. Compare the results of the two calculations and explain possible differences.

A molecule has an ionizable group with a pK_a value of 8. At pH equal to 7.0, estimate roughly how much of the group is deprotonated (expressed as %)? Use 2 decimal points. Do not use scientific notation to enter your answer.

What is the K_sp in terms of the molar solubility s for the substance Fe (OH)₃?

A.s

B.s²

C.2s³

^D. 4s³