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An investigator is conducting kinetic experiments on a first-order reaction A?P for which the rate coefficient at 298 K is k0 = 0.001 s^-1. The activation energy for the reaction is found to be 40 kJ mol^-1. Assume that a simple Arrhenius expression gives the dependence of k upon temperature. The investigator runs the reaction in a container whose temperature is increased to 500 K. What is the change in the half-life time?
What mass of ice at 0C must be added to 45g of water at 20C to cool it to the final temperature of 10C?
We store fats as triacylglycerides and not free fatty acids. We do this because it would change our pH and the osmotic pressure of the adipose cells.
using a sample of river water sample analyzed for total inorganic carbon ,The river pH= 7.1 and an inorganic C concentration of 6.97 mg C/L.c
using henrys law calculate the molar concentration of rm o2 in the surface water of a mountain lake saturated with air
6.3 ml aliquot of 0.0529 m h2so4 aq is to be titrated with 0.0411 m naoh aq. what volume ml of naoh will it take to
The calorimeter contains 1.00 kg of water (heat capacity of H2O = 4.184 J/g°C) and the heat capacity of the empty calorimeter is 0.10 kJ/°C. How much heat is released per gram of oil shale when it is burned?
A buffer solution was prepared by adding 4.95 g of sodium acetate (NaCH3CO2) to 0.250 L of 0.150 M acetic acid (Ka = 1.75 x 10-5). a. What is the pH of the buffer
explain the difference in boiling point between the isomers 1-chlorobutane and 2-methyl-2-chloropropane in terms of structure.
what is the osmolarity of a solution containing 0.1 m nano3 and 0.2 m nacl? what is the molarity of the solution
dry ice solid co2 has a vapor pressure of 1 atm at -77.2 deg celsius and 2 atm at -69.1 deg celsius. calculate molar
The Cl2 removed occupies a 10.0 L container at .500 atm at 25C. How many g of Ne are present in the original container?
how many moles of nitrogen are in 5.3 L container at 1.25 atm and a temp of 85 degrees C.
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