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methyl trifluoroacetate is more reactive than methyl acetate, in nucleophilic acyl substitution reactions. Explain.
A Circuit has two identical capacitors with capacitance 4x10^-6 in parallel connected to two identical four ohm resistors in parallel. What is the initial charge on the capacitors
Calculate the % atom economy for the following two methods for converting benzene, C6H6, to aniline, C6H5NH2. Method 1: C6H6 + (CH3)3SiN3 + 2 F3CSO3H + NaOH
Insects do not have lungs as we do, nor do they breathe through their mouths. Instead, they have a system of tiny tubes, called tracheae, find the oxygen concentration at the interior end of the tube
A sample of diatomic gas has a density of 0.002061g/ml at 1.8 atm pressure and 25.0°C. identify the gas
A 4.00 g sample of an aluminum-copperalloy reacts with excess hydrochloric acid. The 2.81 L of H2(g) produced is collected over water at a barometric pressure of 758.4 mmHg and 19°C. What is the
use the van der waals equation to calculate the pressure of 4.21L CO(g) at 300°C. (a= 1.472 bar L^2mol^-2 and b=0.0395L mol^-1)
Explain why is that based on your understanding of the forces that maintain the native conformation of proteins.
What is the theoretical yield of aspirin in an experiment if you start with 2.0 g of salicylic acid and 5.0 mL of acetic anhydride (density = 1.08 g/mL)
Calculate the % atom economy for the following two methods for converting benzene, C6H6, to aniline, C6H5NH2
It takes 46.8 hours for nitrogen-filled balloon to shrink to a quarter of its original volume by effusion though a very small hole. If the same balloon had been filled with helium,
The Cd2 was displaced from EDTA by the addition of an excess of CN-. Titration of the newly freed EDTA required 25.5 mL of 0.0250 M Ca2 . What were the molarities of Cd2 and Mn2 in the original solu
A 10.1-g bullet is fired into a stationary block of wood having mass m = 5.04 kg. The bullet imbeds into the block. What was the original speed of the bullet
A 0.115 M solution of a weak acid (HA) has a PH of 3.33. Calculate the acid ionization constant (Ka) for the acid.
A 45.8-kg girl is standing on a 161-kg plank. Both originally at rest on a frozen lake that constitutes a frictionless, flat surface. What is the velocity of the plank relative to the ice surface
a mixture consists of 35% He(g) and 65% N2(g) by mass. If it exerts a total pressure of 2.15 atm, what is the partial pressure of helium
Introduced into a 1.70 L flask is 0.120 mol of PCl5 ; the flask is held at a temperature of 227 C until equilibrium is established. PCl5(g) <-> PCl3(g) + Cl2(g) What is the total pressure of t
Lithium will react with oxygen in a pressurized container to produce solid lithium oxide at 25°C. if 0.130 g Li(s) is placed in a 0.500 L container filled with oxygen at 1.90 atm
A 750-N Marine in basic training climbs a 9.5-m vertical rope at a constant speed in 8.25 s. What is his power output
A 38.0 kg box initially at rest is pushed 4.00 m along a rough, horizontal floor with a constant applied horizontal force of 125 N. determine the final speed of the box
When 190.0 mL of 0.360 mol are added to 190.0 mL of 1.00×10?2 M AgNO3 (aq), what percentage of the Ag+ is left unprecipitated?
What is the order with respect to OH ^-1 for this reaction. The answer is 2 and the solution is 2^X = 4 ; X=2. Do I do this with every rate reaction problem.
A crate of mass 10.6 kg is pulled up a rough incline with an initial speed of 1.54 m/s. The pulling force is 108 N parallel to the incline, What is the change in kinetic energy of the crate