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After four half-lives of U-238 have passed, how much of this sample is in the original sample? 1/2 1/4 1/8 1/16
An aqueous vinegar sample contains 5.4% acetic acid by mass and has a density of 1.006 g/mL. Calculate the amount of acetic acid in grams in 2.00 L of this vinegar. Report your answer using the correct number of signi?cant ?gures.
a few compounds exist whose solubility decreases as the temperature increases. how would the values for deltag deltah
a tightly sealed 5.0 l flask contains argon at 71.6 deg. c and 781 mm hg. the flask is heated until the pressure is
A system absorbs 295 kJ of heat and the surroundings do 177 kJ of work on the system. What is the change in internal energy of the system?
At a particular temperature, N2O5 decomposes according to a first-order rate law with a half-life of 3.0 s. If the initial concentration of N2O5 is 1.0 × 1016 molecules/cm3, what will be the concentration in molecules/cm3 after 11.3 s?
When a sample of benzoic acid was burned in a bomb calorimeter having a calorimeter constant of 12.5 kJ/oC, the temperature of the calorimeter (including its contents) rose from 23.18oC to 27.65oC. What mass, in g, of benzoic acid was burned
what is the charge of the carboxyl group in an amino acid at physiological pH. Please explain the charge. Also what is the charge above and below physiological pH
how many liters of oxygen will be produced if 162 grams of aluminum chlorate is decomposed
The amount of energy needed to heat 2.00 g of carbon from 50.0 C to 80.0 C is 42.6 J. what is the specific heat capacity of this sample of carbon.
Calculate the energy (joules) required to achieve the transition from the ground state to the first excited state for this system.
Suppose that a 1.0 L reaction vessel initially contains 1.0 mol ofO3 and 1.0 mol of O2. What fraction of the O3 will have reacted when the rate falls to one-half of its initial value?
what would happen to the pressure inside the container if you decrease the temperature to one fourth the original
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