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Question- The half life of potassium 40 is 1.26*10^9 years. if the natural abundance of K 40 is 0.010% and 3500 disintegration of K 40 occur every 10.0sec, in human body weighing 100kg,then what is the concentration of potassium in clued all isotopes in that body? Assume density of human is 1g/ml
If possible just a to the point details about how you got the answer?
dinitrogen pentoxide n2o5 decomposes in the gas phase to form nitrogen dioxide no2 and oxygen gas o2. the reaction is
A 5 cm thick beef steak is being frozen in a -30 C room. The product has 73% moisture content, density of 970 kg/m^3, and a thermal conductivity (frozen) of 1.1 W/ (m K). Estimate the freezing time using Plank's equation
moist air exerts lower pressure and dry air exerts high pressure. how would the volume of the hydrogen gas that was ollectes been different if this eperiment was done on a very rainy day/ on a very dry day?
How many seconds after the start of the reaction does it take for the reactant concentration to decrease to 0.0185 M?
the catalyst reacts with the reactants. B. A catalyst initiates a chemical reaction. C. A catalyst lowers the activation energy of the reacting molecules
The original molarity of a solution of formic acid (HCOOH) with a Ka= 1.7*10^-4 whose pH is 4.52 at equilibrium is: A. 8.52 *10^-9 B. 2.24*10^-4 C. 6.78*10^-3 D. 3.54*10^-5 E. 5.32*10^-7
The pressure was readjusted to 4423 torr by moving the piston. What was the volume occupied by the sample under the new conditions if the temperature remained constant throughout
that forms when gaseous nitrogen dioxide pollutant reacts with gaseous oxygen and liquid water to form aqueous nitric acid. Write a balanced chemical equation for this reaction.
why is it proposed that the alcohol functional group is protonated by aid before dehydration can occur via either e1 or
you are given a stock solution of edta at a concentration of 5mm how would you dilution of edta with a final
Problem- Rank these species by their ability to act as an oxidizing agent from best oxidizing agent to worse oxidizing agent.
a graduated cylinder contains 18.5 of water. what is the new water level after 32.0 of silver metal with a density of
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