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Determine which H atom transition (ninitial,nfinal) was responsible for the emission of a photon with a frequency of 6.91 x 1014 Hz.[RH = 2.18 x 10-18 J; h = 6.63 x 10-34 J s ]
The Rb-Sr data given below are for whole-rock samples from amphibolite metamorphic facies of theLewisian gneiss complex in Scotland (Moorbath et al., 1975), and the Sm-Nd data are for whole-rocksamples from granulite metamorphic facies of the same..
Calculate the heat released when 25.0 g of water at 0 degrees C crystallizes to ice at the same temp. The specific heat of water is 1.00 cal/(g *degrees C); the heat of fusion is 80.0 cal/g and the heat of vaporization is 540.0 cal/g
a student heats 5.128 g sodium bicarbonate to completely decompose the sample to sodium carbonate. 3.2349 g of sodium
Isotopes Decay, Isotopes decay according to first order kinetics with a predictable half life
What volume of 0.955 M HCl, in milliliters, is required to titrate 2.152 g of Na2CO3 to the equivalence point?Na2CO3(aq) + 2HCl(aq) ---> H2O(l) + CO2(g) + 2NaCl(aq)
Carbonyl fluoride, COF2 is an important intermediate used in the production of fluorine-containing compounds. For instance, it is used to make the refrigerant carbon tetrafluoride
what is the ph of a phosphate buffer when h2po4-140mm and hpo4-23omm? assume the pka for this titration is
List the major elemental and molecular components of gasoline. Include their chemical formulas.
How many moles of H^+ came out of the column? c.) How many moles of Ag^+ were trapped by the column? d.) How many moles of Ag^+ came out of (i.e. were eluted from) the column
You have aqueous solutuin of HCl, NaCH3COO and AgNO3. What are the ions that are present in these aqueous solution. When you mix all of the solutions together, what reaction, if any occurs.
Considering the combustion of propane, how many grams of O2 are needed to completely burn 32.1g of C3H8
Silver metal crystallizes in a face centered cubic unit cell. The edge of the unit cell has a length of d = 407pm. What is the radius in picometers of a silver atom
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