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If a pure R isomer has a specific rotation of -133.0°, and a sample contains 64.0% of the R isomer and 36.0% of its enantiomer, what is the observed specific rotation of the mixture
A team of tornado-chasing meteorology graduate students is out in search of tornados. What frequency of sound do the students hear
The enthalpy change when 1 mol methane (CH4) is burned is -890 kJ. It takes 44.0 kJ to vaporize 1 mol water. What mass of methane must be burned to provide the heat needed to vaporize 1.00 g of wate
Communications satellites are placed in a circular orbit where they stay directly over a fixed point on the equator as the earth rotates. What is the speed of a satellite in a geosynchronous orbit
As you stand on a pier looking at a harbor, the waves created by a large freighter come ashore. You estimate the wavelength to be 3.0 m, What is the frequency of the wave in hertz
A tertiary alkyl halide reacts with a weak base and nucleophile. The reaction will proceed via which of the following mechanisms? A) SN1 B) SN2 C) E1 D) E2 E) SN1 and E1
A laser used in cutting or drilling metals produces 10 ns pulses at 1.00 J per pulse. What is the peak power of each pulse
What is the theoretical yield for this reaction under the given conditions? 1.40 g of H2 is allowed to react with 10.0g of N2, producing 1.65 g NH3.
A perfect cube with sides of 9.0cm is placed so that one corner is at the origin and its faces are parallel to the coordinate planes, find the total charge located within the cube
You want a reaction that will afford the highest yield for the conversion of 2-bromo-2-methylpentane to 2-methyl-1-pentene. Which of the following sets of reagents would work the best
When alkyl halides react, rearrangements are likely to occur in which of the following types of reactions? A) SN1 B) SN2 C) E1 D) Both SN1 and E2 E) Both SN1 and E1
Explain why polar solvents would be expected to increase the rate of the reaction in exercise
Determine the molecular geometry, or shape, of ClO2 a. octahedral b. tetrahedral c. trigonal bipyramidal d. trigonal planar e. t-shaped f. bent
The main reason that alkyl halies are good electrophiles is that: A) the carbon atom linked to the halogen is negatively polarized. B) the carbon atom linked to the halogen is positively polarized
Which of the following is a tertiary alkyl halide. Can you please expalin why A) (CH3)2CHBr B) (CH3)2CHCH2CI C) (CH3)3CCI D) CH3CH2CHBr2 E) CH3CHBr2
a 2.50 kg firework shell is fired straight up from a mortar and reaches a height of 110 m. Neglecting air resistance, calculate the shell's velocity when it leaves the mortar
An explorer is caught in a whiteout (in which the snowfall is so thick that the ground cannot be distinguished from the sky) while returning to base camp. How far (in km) must he now travel to reach
How many grams of acetic acid is this. If the mass of analyte is 10.20 grams, what is the mass % of acetic acid in the analyte
A proposed space station includes living quarters in a circular ring 52.0 m in diameter. At what angular speed should the ring rotate
CO +H2O -> <- CO2 +H2. Initially there are aM CO, bM H2O, if xM H2 is generated during the reaction the the value of Kc should be (a) Kc= 1/ ab (b) Kc= x^2/ ((a-x)(b-x)) (c) Kc= x/ ((a-x)(b-x)
What is the Reynolds number for the fastest falling ball in the experiment. Use the same data as in problem 1, glycerin density of 1.30 g/cm^3
Assume all the step reactions except the rate determining step are fast reactions and at equilibrium, which step reaction, do you think, is the rate determining step? (a)Cl2 -> 2Cl (b)H2 +Cl ->
a thin lens of focal length 30.0 cm and is used to form an image that is twice the size of the object. Find the object position
Calculate the pH of a 0.10 M solution of sodium formate (NaHCOO) given that the Ka of formic acid (HCOOH) is 1.8 x 10-4.