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Explain why it would have been inadvisable to supply hydrogen and sodium in elemental form and why it is not neccessary.
Potassium hydroxide is used to precipitate each of the cations from their respective solution. Determine the minimum concentration of KOH required for precipitation to begin in each case.
For a gaseous reaction, standard conditions are 298 K and a partial pressure of 1 atm for all species. For the reaction C2H6 (g)+ H2 (g) -> 2CH4
There are 2.2 mg of lead in exactly 500 g of a water sample. What would the concentration of lead be in parts per million.
calculate the micrograms (to the nearest microgram) of iodine per serving in the finished product. Show your work.
The half-equivalence point of a titration occurs half way to the end point, where half of the analyte has reacted
When X-rays with a wavelength of 154 pm (pm = 10^-12 m) are diffracted from an unknown crystalline compound, the first reflection occurs at theta= 4.24 What distance does that correspond to? (assume n =1)
The first ionization energy of a boron atom is 1.33 aJ. What is the frequency and wavelength, in nanometers, of photons capable of just ionizing boron atoms?
A sample of 0.50 moles of O2 gas initially at 250K and a pressure of 1.0 atm is compressed to final pressure of 12 atm. The compression can occur via two different paths
calculate the individual masses of C, H, and O in the 0.7549 g sample.
there are two natuarlly occuring isotopes of rubidum. (85)Rb has a mass of84.9118 amu. (87)Rb has a mass of 86.9092 amu. Determine the abundance of each isotpe.
B2H6 + 3O2= B2O3+3H2O ; delta H=-2035 KJ how much heat is released when a mixture of 7.35 g B2H6 and 2.60 g O2 is burned?
What is the concentration of free Ni2+ ions in a saturated Ni(OH)2 solution if the pH is buffered to remain at 8.4? The Ksp of Ni(OH)2 is 6.0 x 10^-16.
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