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Radioactive isotope X has been found in rock units S and Q. Isotope X breaks down into isotope Z with a half life of 250 million years. Samples from unit Q indicate 25% parent isotope X and 75% daughter isotope Z while unit S has 6.25% parent isotope X and 93.75% daughter isotope Z. How old is unit Q and how old is unit S?
it was found that at 344 seconds the concentration of dinitrogen pentoxide was 0.696 mol/L and at 708.1 seconds the concentration of dinitrogen pentoxide was 0.237 mol/L. What is the rate of decomposition over the specified time period in this rea..
A 2.20 g sample of a large boimolecule was dissolved in 13.0 g of carbon tetrachloride. The boiling point of this solution was determined to be 77.85°C. Calculate the molar mass of the biomolecule.
What volume of solution should be dispensed from the buret to provide 5.633 mmol CO2-3 ? Answer in units of mL.
How to calculate ion mobility of DNA as well as single molecule of dNTP? This calculation would be further used for conductivity of DNA or dNTP in solution.
Calculate the volume in liters occupied by 0.350 moles of propane gas at a pressure of 0.850 atmospheres
magnesium burns in air to produce magnesium oxide mgo and magnesium nitride mg3n2. magnesium nitride reacts with water
how many grams of oxygen are produced. what are the limiting and excess reactants and how much ER remains
How many grams of water can be cooled from 36 degrees celsius to 23 degrees celsius by the evaporation of 53g of water.
Rubidium has two naturally occurring isotopes: Rb-85 with mass 84.9118 amu and a natural abundance of 72.17%, and Rb-87 with mass 86.9092 amu and a natural abundance of 27.83%.
determine whether a precipitate will form from the following reactants and if one does form write the total and net
Show by writing appropriate chemical equation how each of the following conversions could be achieved: 2-hexyne from 1,1-dichlorobutane.
In some industrial processes, sulfite is added to remove dissolved O2 to prevent corrosion of pipes. Write the balanced overall chemical reaction for reduction of dissolved O2 by sulfite (SO32-).
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