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Explain Half life equation for first order reactions t 1/2 = 0.693/k where t1/2 is the half life in second as well as k is the rate constant in inverse seconds
A) Explain what is the half life of a first order reaction with a rate constant of 5.10 * 10^-4/s
B) Explain what is the rate constant of a first order reaction that takes 6.10 minutes for the reactant concentration to drop to half of its initial value
C) Define a certain first order reaction has a rate constant of 5.10*10-3/s how long will it take for the reactant concentration to drop to 1/8 of its initial value
How much heat in kilojoules is required to warm 10.0 g of ice, initially at -10.0^\circ C, to steam at 110^\circ C. The heat capacity of ice is 2.09 {\rm J}/{\rm g} ^\circ {\rm C} and that of steam is 1.84
The following reaction is known to have a standard change in enthalpy of 148 kJ/mol and a standard change in entropy of 312 J/(mol•K) at 25ºC. What is the normal boiling temperature (ºC) of XY3? XY3(l) ? XY3(g)
A tightly sealed 5.0 L flask contains argon at 85.2 deg. C and 781 mm Hg. The flask is heated until the pressure is doubled. What it the temperature of the gas
Does the body have an impact on the brain? If so, how much? What do you have to back up your position?
What volumes of COsub2 and NHsub3 a 200. atm and 450. degree C are needed to produce 2.50kg of urea, assuming the reaction goes to completion
If a solution has a pH = 7.0 and Cd2+ is added to it (the ksp of Cd(OH)2 = 2.5 x 10-14) what molar concentration of cadmium ion is needed for precipitation to occur
Determine the heat of combustion of ethyl alcohol (C_2 H_6 O). How much ethyl alcohol must be burned to generate enough heat to warm exactly one liter of water from 60 degrees faranheit to 180 degrees faranheit
a chloroform solution of caffeine c8h10n4o2 contains concentration of 0.0868 m . compute mole fraction of
a compound contains 10.13 c and 89.87 cl by mass. determine both the empirical formula and the molecular formula of the
A sample of 1 mol perfect gas molecules with Cp,m equal to 7R is put through the following cycle (a) constant-volume heating to twice its final pressure, (b) reversible adiabatic expansion backs to its initial temperature
The Starship Enterprise is caught in a time warp and Spock is forced to use the primitive techniques of the 20th century to determine the specific heat capacity of an unknown mineral.
A sugar-water mixture contains 45.8 g of sugar and 108.5 g of water. What is the percent by mass of sugar and the percent by mass of water in the solution?
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