An unequal stereoisomeric product mixture results from the reaction of trans-stilbene with pyridinium tribromide. What is the major product of this reaction and should there be any optical activity in a solution containing the product mixture? If cis-stilbene were used as our sta...
31 Mar 2020Analysis of a white solid produced in a reaction between chlorine and phosphorus showed that it contained 7744% chlorine Determine the empirical formula Give the name of the compound produced Tell whether the compound is molecular or ionic
31 Mar 2020A compound containing carbon and hydrogen contains 4.75 g of carbon and 0.80 g of hydrogen. The molar mass of the compound is about 28 g/mol. What is (a) the empirical formula of the compound and (b) the molecular formula of the compound?
31 Mar 2020in the figure, a 0.400 kg ball is shot directly upward at an initial speed of 30.7 m/s. What is its angular momentum about P, 1.89 m horizontally from the launch point, when the ball is (a) at maximum height and (b) halfway back to the ground? What is the torque on the ball about...
31 Mar 2020At 25 °C only 0.0220 mol of the generic salt AB2 is soluble in 1.00 L of water. What is the Ksp of the salt at 25 °C?AB2(s) = A2(aq)2B-(aq)Ksp = ________
31 Mar 2020At 37 °C the equilibrium concentration of Ca2 inside a cell is 0.078 M and outside is 0.038 M. The cell membrane is permeable to Ca2. The only ion present in addition to Ca2 and Cl– is a protein (Prin/–) inside the cell. The protein holds a single positive or negative charge...
31 Mar 2020At a liberal arts college, 90% of the freshmen are enrolled in English 105, 80% are enrolled in Mathematics 101 and 5% are enrolled in Mathematics 101 but not in English 105. A freshman is randomly selected. What is the probability that the freshman is enrolled in both English 10...
31 Mar 2020At a rock concert, a dB meter registered 126 dB when placed 2.5 m in front of a loudspeaker on the stage.A.What was the power output of the speaker, assuming uniform spherical spreading of the sound and neglecting absorption in the air? B. How far away would the sound level be a ...
31 Mar 2020Barium has a work function of 2.48 eV.A. What is the maximum kinetic energy of electrons if the metal is illuminated by UV light of wavelength 370 nm ?B. What is their speed?
31 Mar 2020what happened to the ionic and covalent character of alkali metal hydrides on moving down the group
31 Mar 2020what volume of acytilides measured at standard conditions could be obtained from 10 grams of calcium carbide?
31 Mar 2020what volume of acetylides measured at standard conditions could be obtained from 10 grams of calcium carbide?
31 Mar 2020difference between stereochemistry of sn1& sn2
31 Mar 2020Describe hybridization benefit for the eradication of disease
30 Mar 2020by term Weiss indices and millers indices
30 Mar 2020what is the flaw of Rutherfords model?
30 Mar 2020500 gm of an urea solution (mole - fraction of solute = 0.2) is diluted to 1500 gm. The mole - fraction of solute in the diluted solution is
30 Mar 20202 Functions of the skull, trunk, Forelimbs, and hind limbs How is the position of the eyes related to the sight of the organism? What is the function of th deltoid ridge?
30 Mar 2020two boys push horizontally a 30 kg bicycle and it accelerates at 1.5 m/s. if the sum of opposing force is 40n.what force must they be exerting on it?
30 Mar 2020which kind of root system is better for adapted for anchorage? why?
30 Mar 20201) Why does O2 has a higher boiling point than F2? 2) Why does O2 has a lower boiling point than NO?
30 Mar 2020how the current flow is zero in galvanometer in the meter bridge
30 Mar 2020The choro substituted acids are more acidic. e.g. Some the acid dissociation constants are: Acetic acid, HC2H3O2 Ka = 1.8×10 –5 Chloroacetic acid, HC2H2ClO2 Ka = 1.4×10 –3 Dichloroacetic acid, HC2HCl2O2 Ka = 5.5×10 –2 Trichloroacetic acid, HC2Cl3O2 Ka = 3
30 Mar 2020what is the function of dichloromethane in bromination reactions
30 Mar 2020I have practical report ( ascorbic acid ) The attachment file contains notes . The second part of experiment is standadization of DCpip Ascrobic acid equvalence of Dcpip =0.1 mg/ml×10ml ÷titration volume of Dye(dcpip)ml titration volume of Dye(dcpip)ml=7 (( my result )) *********...
30 Mar 2020explain when the potential difference between the terminals of a battery is not always the same as its emf
30 Mar 2020what are additives in polymer 2. what are the chemistry of additive in polymer 3. what are roles of additives in the production of polyvinylchloride pipe 4. what are roles of additive in the production of plastics 5. what is the chemistry plasticizers in polymer
30 Mar 2020Which hydrocarbon is most easily oxidized by KMnO4 and which is most reactive towards bromine water?
30 Mar 2020how can you determine whether a culture or subculture is pure
30 Mar 2020Describe an imaginary process that satisfies the second law of thermodynamics. 2) Describe an imaginary process that violates the first and second of thermodynamics. 3)What is thermal energy resvior?Give some examples. 4)Consider the process of baking potatoes in a conventional o...
30 Mar 2020the cost of fuel in the running of an engine is proportional to the square of the speed and is rs 48 per hour for speed of 16 kilometers per hour.other expenses amount to rs 300 per hour.what is the most economical speed?
30 Mar 2020what are the different bones present in the skull of frogs? and what are its functions?
30 Mar 2020for an ideal otto engine with 17% clearance and an initial pressure of 93.08 kpa, determine the pressure at the end of compression using air-standard (k=1.4). If the pressure at the end of the constant volume is 3447.4 kpa, what is the mean effective pressure in kpa?
30 Mar 2020why do we use an ammeter in microamps when a diode is reverse biased
30 Mar 2020explain the principle of transmissibility with the help of an example..
30 Mar 2020What kinds of clean hospital materials would you sterilize by baking? Why?
30 Mar 2020Regression equations are created by modeling data, such as the following: Sales = (Cost Per Item × Number of Items) – Constant Charges In this equation, constant charges may be rent, salaries, or other fixed costs. This includes anything that you have to pay for periodically as a...
30 Mar 2020what are the biotic and abiotic factors affecting the freshwater crocodile?
30 Mar 2020Discuss in short the polymorphism in Obelia, Vallela, Physalia, Porpita, Aurilia?
30 Mar 2020the ksp for BaCo3 is 5.1x10^-9. how many grams of BaCO3 will dissolve in 1000mL of water?
30 Mar 2020A 2kg block sitting on a horizontal surface is subjected to a horizontal force of 7.5 N. If the resulting acceleration of the block is 3 m/s square, what is the magnitude of the friction force opposing the motion of the block?
30 Mar 2020how to find internal resistance of daniel cell by using potentiometer
30 Mar 2020A compound has the empirical formula C2H3O2.Its vapour density is 59.its molecular formula will be?
30 Mar 2020it is possible to dissolve significant amounts of Mg(OH)2 n solution in which the concentration of either Mg or OH is very very small. explain in terms of Ksp
30 Mar 2020assumptions and implications of NI Approach. Is there an optimal capital structure as per NI Approach
30 Mar 2020Difference in competencies of ADN and BSN nursing practice significance of Evidence Based Practice in nursing
30 Mar 2020A medical researcher is studying the spread of a virus in a population of 1000 laboratory mice. During any week, there is an 80% probability that an infected mouse will overcome the virus, and during the same week, there is a 10% probability that a noninfected will become infecte...
30 Mar 2020the density of ice is 0.92 g cm^-3 and of seawater is 1.025 g cm^-3. Find the total vol. of an iceberg that floats with its vol. 800cm^3 above water
30 Mar 2020assumptions and implications of NI Approach. Is there an optimal capital structure as per NI Approach
30 Mar 2020The length of a rectangle is 10 m more than its breadth. If the perimeter of the rectangle is 80 m, how do you find the dimensions of the rectangle?
30 Mar 2020
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