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The MRI (magnetic resonance imaging) body scanners used in hospitals operate with 400 {rm MHz} radiofrequency energy.How much energy does this correspond to in kilojoules per mole?
How many grams of sulfur (S) are needed to react completely with 369 g of mercury (Hg) to form HgS?
A 180 kiln is used for vitrifying ceramics. It is currently operating at 1025 , and the pressure is 1.100 . How many moles of air molecules are within the confines of the kiln.
Nickel is a transition element and has a variable valence.Using a nickel salt, 2 F (faradays) plate out 39.2 g ofnickel. What ions are in the solution of this salt? Atomic molar masss Ni = 58.7 g·mol-1
calculate the change in the entropy of the universe between the time that the contents of the glass enter the lake and when thermal equilibrium is subsequently restored. State any approximations made in your calculation.
using a sample of 35.00 ml of hcl solution after titrating it with a 0.1477 m naoh solution. it is observed that a
The solubility of the ionic compound M2X3, having a molar mass of 214 g/mol, is 3.18 10-7 g/L. Calculate the Ksp of the compound.
determine how many grams of copper sulphate are there in 219 grams of an aqeous solution that is 20.2 by weight of
Which of the available reagent(s), if any, will oxidize Fe(s) while leaving Cu(s) unreacted? If none of the available reagents can be used for this purpose, then identify another reagent from the table that could be used. For each reagent you've i..
What is the half life? How long would it take for the concentration of CH3NC to decrease to 75% of its initial value? to 30% of its initial value
pocl3g poclg cl2g is at equilibrium. which of the following statements describes the behavior of the system if the
How many grams of dry NH4Cl needed to be added to 1.50L of a 2.00M solution of ammonia NH3 to prepare a buffer solution that has a pH of 8.60?
The solubility product constant of calcium sulfate,CaSO2 is 7.10*10^-5 . How many grams of calcium sulfate can dissolve in 53.5 of pure water
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