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What happens to isotopes that are unstable? What are the mechanisms by which unstable isotopes may decay into stable isotopes? How may these natural processes be used by chemists to make measurements in the medical, environmental or analytical chemical fields.
A nonvolatile nonelectrolyte compound having a molar mass equals to 18000 g/mol is dissolved to give 100 mL aqueous solution that has an osmotic pressure equals to 26 mmHg at 27oC. The mass (in g) of this compound dissolved in this solution is: A)..
calculate the number of joules required to melt 43.6g of benzene at 5.5 degrees celsius?nbspthe heat of fusion for
If you wanted to prepare a solution of CO in water at 25 in which the CO concentration was 2.1 mM , what pressure of CO would you need to use
for nitrogen gas dissolved in blood serum the henrys law constantis 8.42 times 10-7 mol l-1 mmhg-1. if a scuba diver
Question- A sample of O2 gas is stored at 30.0 C and 75torr. If the volume was 125mL how much did the oxygen weigh
Calculate the increase in the boiling point, ΔT, for a 1.87 m solution of sucrose (dissolves as a molecule) in water.
Why would a producer decide to produce in a competitive market in which she will earn zero profit in the long run?
The number of directions each rod can point in per unit solid angle is λ. Consider a dilute system (N
The Ka value for boric acid is 5.8* 10^{-10}. What is the pH of an aqueous eye wash solution that is 1.3% boric acid by mass? Assume the density of the solution is the same as that of water.
What experimental error would cause a mistaken increase of copper into the cycle? What is done in the Experimental Procedure to avoid this "positive" error? Explain a. Explain what factors may contribute to a greater than 100% recover of copper in t..
explain why this series of reaction will produce the 3,5-dibromotoluene and direct bromination of toluene produces the 2,4-dibromotoluene.
Problem- you need to prepare 100 mL of a pH=4.00 buffer solution using .100 M benzoic acid (pKa = 4.20) and .160 M sodium benzoate. How Much of each solution should be mixed to prepare this buffer
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