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Explain what are the minimum frequency and maximum wavelength of light that will dislodge an electron from Ca?
A standard analysis for determining the amount of oxalate ion, C2O42-, in a sample is to precipitate this species as calcium oxalate, which is insoluble in water. Write the net ionic equation for the reaction between sodium oxalate and calcium chl..
a a catalyst may be defined as a substance that enhances the rate of a chemical reaction without being consumed in the
If your electricity comes from a 33% efficient nuclear power plant, how many Pu-239 nuclei are produced as a result of your leaving the light on?
Consider two hypothetical elements, W and Z. Element W has an electron affinity of ?150 kJ/mol, and element Z has an electron affinity of ?38 kJ/mol.
Draw electron-dot formula and determine the shape for each of the following: a) NH4^+; b) O2^2-; c) COCl2 (C is the central atom); d) BCl3.
Microwave radiation of wavelength 4.00 mm is used to heat 250.0 grams of water from 10.6 degrees C to 100.0 degrees C. How many photons are needed?
Assume that the density of the mixed solutions is 1.00 g/mL, that the specific heat of the mixed solutions is 4.18 J/(g celcius), and that no heat is lost to the surroundings. The deltaHrxn for the neutralization of NaOH with H2SO4 is -114 kJ/mol ..
A solution of an unknown nonvolatile electrolyte was prepared by dissolving 0.250 g of a substance in 40 g of CCl4. The boiling point of the resultant solution was 0.357 degrees Celsius higher than that of pure solvent. Calculate the molar mass of..
a test tube containing a mixture of kcl kclo3 and mno2 having a total weight of 23.584 g was heated to compose the
The analysis of a coal from Pennsylvania is reported as follows (wt. %)
container Ais filled with air at STP, it is then inserted into a large enclosed container B, which is then flushed with H2(g), what will happen to the pessure inside container A? explain your answer.
Calculate the size of the quantum involved in the excitation of an electronic motion of frequency 1.0 X Hz. Express the results in kilojoules per mole. I know how to get to E, it is Help greatly appreciated.
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