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In thin layer chromatography, solvent percolates upward through capillary action and displaces the air surrounding the particles on the plate's surface, resulting in good contact between mobile and stationary phases. In column chromatography, how is that good contact ensured?
2Mg(s) + O2(g) → 2MgO(s), How many grams of MgO are produced when 40.0 grams of O2 react completely with Mg
iF 0.80g of a gas occupies 295 mL at 25 degrees Celcius and 680 mm Hg of pressure, what is the molar mass of the gas.
what is the intermediate of the photochemical isomerization of (E,E)-2,4-hexadiene to (Z,E)-2,4-hexadiene ? Draw the structure of this nternediate
Chemical Reactions explained in this solution, 1. Some sulfuric acid is spilled on a lab bench. It can be neutralized by sprinkling sodium bicarbonate on it and then mopping up the resultant solution. The sodium bicarbonate reacts with sulfuric ac..
Baking soda, baking powder - what's the difference? Both are white powders, odorless and nearly indistinguishable
If the sample contains a combined total of 1.75 grams per mole and has a total mass of 51.0 grams, what are the percentages of CO2 and Ne in the sample by mole?
Nuclear reactions is expressed in given reaction as 2/1H +2 /1H→3/2He + ? ; 233/92U+1/0n→133/51Sb+98/41Nb+?1/0n
Two methods for determining Hg in coal fly ash using atomic absorption were used to see if both methods would give the same results. In the first method only HNO3 is used for digestion,
calculate the ph of a solution formed by mixing 250.0 ml of 0.15 m nh4cl with 100.0 ml of 0.20 m nh3. the kb for nh3 is
An aqueous solution of a monoprotic acid HA (Ka = 4.33×10-1) has a pH of 4.88. What is the molarity of the solution? (i.e. [HA]+[A-].)
which obeys the Van der Waal's equation. Investigate graphically using appropriate software (like Maple) the behavior of Z above and below the Boyle temperature. Obtain an expression for the Boyle temperature for a Van der Waal's gas.
Platinum crystallizes with a face centered cubic lattice. The atomic radius of platinum is 0.138nm, and the atomic mass is 195.1 . (a) Calculate the lattice parameter of Pt from these data
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