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Problem- What is the mol% of Pd used in this reaction? (ex: 5% mol% catalyst means that the reaction uses 5% as much catalyst as limiting reactant)
I dissolved .179 grams of 1-methyl-4-bromobenzene to 5 mL ethanol. I added .155 g 4-methoxyphenylboronic acid. I rinsed the vial with 2 mL ethanol and added the washings to the reaction mixture, followed by Pd solution (200 microliters, 1.0 mg/mol Pd in water). I stirred for 1 minute and then added 1 mL of KOH.
State your answer by means of two significant figures.
Jeremy is an eight year old boy that is experiencing problems at home and at school. While at home, his mother often complains that he is very messy, disorganized, and is frequently interrupting others. At school, his teachers report that he i..
the top of Mount Everest where the air pressure is 0.35 atmospheres. What is the volume of your balloon on top of Mount Everest
Consider the question posed in the Schaefer text in Chapter 5: Why don't we study Whiteness? What is defined as White? How have groups historically ended up under this term? What were some of the challenges of White ethnic groups which imm..
Show the product of the reacting excess benzaldehyde with ethyl propionate (added slowly) with sodium ethoxide catalyst, following hydrochloric acid.
In the United States, people of this ethnic background have the highest rate of binge drinking and heavy drinking. a. European Americans b. Hispanic Americans
What is the solubility of lead chloride (PbCl2) in 0.505 M NaCl (aq). Justify your answer by giving the maximum hydroxide concentration for both Ca2+ and Fe2+ before precipitation would begin. Be sure to show your work.
Which ethnic group has the lowest rates of heavy and binge drinking? a. European Americans b. Asian Americans
There are two benzylic bromides that give (E)-4,6-dimethyl-3-phenyl-3-heptene on E2 elimination. Draw them.Use wedge and dash bonds to indicate stereochemistry.
Explain the role of the nervous system. Describe the effect of fear, aggression, or anxiety on the specified behavior. Explain the function of the hormones involved and how they relate to the behavior.
Use the values in Appendix D of your text to calculate Ka to four decimal places for the hydrogen sulfate ion at 25 °C. (The answer in my Chem II text is 0.012.) HSO4-(aq) SO42-(aq) + H+(aq) Ka = ?
how much energy (MJ) can be obtained from incineration and how much CO2 (kg/year) may be released in that year? 2) How much of that energy (MJ) can be actually converted into electric power if the conversion efficiency is 23%?
reaction takes place in acidic solution, \rm H_2O{(l)} and \rm H^+{(aq)} will be involved in the reaction. Places for these species are indicated by the blanks in the following restatement of the equation
Suppose 18.92mL of Na2S2O3 solution were necessary to titrate the iodine formed from 20.95mL of a 0.0100M KIO3 solution and excess KI, Explain what is the molarity of the Na2S2O3 solution
For the equalibrium PCl5(g) PCl3(g) + Cl2(g), Kc= 2.0 x 10^1 at240 celcius. If pure PCl5 is placed in a 1.00-l container and allowed to come to equalibrium, and the equalibrium concentration of PCl3(g) is 0.23 M, what is the equalibrium concentr..
Calculate the freezing point and boiling point of an antifreeze solution that is 50% by mass of ethylene glycol in water. Ethylene glycol is a non electrolyte.
If the boiling point of the pure of (S)-(-)-alpa-phenylethylamine is 186-188 degrees Celsius, what is the bp of its enantiomer. What optical rotation would be observed if 3.72 g of (S)-amine were mixed with 3.72 g of the (R)-amine
a projectile is fired with speed v0 at an angle theta from the horizontal from the horizontal as shown in the
For the reason that lone pairs are larger than bonding pairs, lone pair-lone pair interactions are greater than lone pair-bonding pair interactions, define which are in turn larger than bonding pair-bonding pair interactions
a mass of ccl4 is vaporized at 100.0 c to fill a flask with 275.0 ml when the atmospheric pressure is 753.9 torr. if
Problem- The reaction, C2H5Cl C2H4 + HCl, follows first-order kinetics and has an activation energy of 237 kJ mol-1. At 477 °C, k = 0.000904 s-1. Find the temperature (in °C) at which half-live will be 9.96 min
Rank the following titrations in order of increasing pH at the equivalence point of the titration (1 = lowest pH and 5 = highest pH).
how many total moles of ions are released when each of the follwing samples dissolves completely in water?
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