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What is the retention factor for the following TLC plate if the baseline is 1 cm, elution solvent traveled 5 cm from the bottom of the plate, and the spot of interest traveled 3.5cm?
a.) .70b.) 1.4c.) .88d.) 1.1
Calculate the number of molecules inside the cell, which is 3.6um long and 1.2 um in diameter.
A solution contains 9.87 (g) of dissolved silver. How many moles of potassium chloride must be added to the solution to completely precipitate all of the silver?
a sample of helium effuses through a porous container 6.5 times faster than does unknown gas x?what is the molar mass
Electrons are ejected from sodium metal by any light that has a wavelength shorter than 544 nm. What is the kinetic energy of an electron (in J) that is ejected from sodium by light with a wavelength of 267 nm?
A cylinder, with a piston pressing down with a constant pressure, is filled with 2.00 of a gas (), and its volume is 42.0 (). If 0.500 of gas leak out, and the pressure and temperature remain the same, what is the final volume of the gas inside th..
Iodine gas and bromine gas combine to form iodine monobromide according to the following equation with an equilibrium constant of 1.2 x 102 at 150 0C. I2 (g) + Br2 (g) 2IBr (g)
what is a given and how much water must be mixed with concentrated hydrochloric acid to prepare 50 cubic cm of 6 molar hydrochloric acid solution?
scientist wants to make a solution of tribasic sodium phosphate for a laboratory experiment. how many grams of the
A metallic element with edge length 362 pm crystallizes in a face-centered cubic unit cell. What is radius of the atom
Describe the type of bonding that your unknown has (covalent, polar covalent). Locate and show any dipoles in your compound
The rate constant (k) for a reaction was measured as a function of temperature. A plot of ln*k versus 1/T (in K) is linear and has a slope of -5355K . Calculate the activation energy for the reaction.
which of the following alcohols undergoes dehydration at the fastest rate on being heated with sulfuric acid? a) 1-Butanol b)2-Methyl-1-butanol c)2-Methyl-2-butanol d)3-Methyl-1-butanol e)3-Methyl-2-butanol
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