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draw an apparatus list necessary equations and make an illustrationflow graph that shows how to determine the
what problem will ensue if the level of the developing liquid is higher than the applied spot in a tlc
23 g of oxygen are reacted with sufficient nitrogen to make 33 g of nitrogen dioxide according the following reaction
a student finds a shiny gold-covered rock and decides to determine if it is gold she first determines that the mass of
in the molecular structure of maleic acid and fumaric acid there are four h atoms however the compounds are diprotic
the vibrational transition for h35cl occurs at 28856 cm-1 if d35cl has the same force constant where would the
in spectrophotometry what is the theorywhy is there a linear relationship between i absorbance and concetration and ii
what is the the concentration of each ion present in the solution formed by mixing 390 g kcl in 750 ml of 0280 m cacl2
a weather balloon has a volume of 750 l when filled with helium at 8 degrees c at a pressure of 380 torr what is the
a sce and an indicator electrode were connected to a voltmeter all conditions were standard the observed cell emf at 25
the chemical 5-amino-23-dihydro-14-phthalazinedione better known as luminol is used by forensic scientists in analyzing
calculate the theoretical amount of cacl2 that would be required to change the temperature of 500 ml of water from 20c
part a methyl violet is an indicator that changes color over a range from ph00 to ph16 what is ka of methyl violetpart
leadii forms soluble hydroxo complexes in excess base calculate the molar solubility of lead hydroxide yellow form at
if 1676 ml of an aqueous solution of naoh reacts with 05683 g of khc8h4o4 how many moles of naoh reacted what is the
use the ksp values to calculate the molar solubility of each of the following compounds in pure waterpart a baso4 ksp
190 ml of 0126 m diprotic acid h2a was titrated with 01017 m koh the acid ionization constants for the acid are ka1
a beaker with 160 ml of an acetic acid buffer with a ph of 500 is sitting on a benchtop the total molarity of acid and
twenty-five milliliters of liquid nitrogen density 0807 gml is poured into a cylindrical container with a radius of
determine whether each of the following salts will form a solution that is acidic basic or -neutral1 naclo2 c2h5nh3cn3
when backpacking in the wilderness hikers often boil water to sterilize it for drinking suppose that you are planning a
how many moles of boron tribromide bbr3 are present in a sample tht contains 602 moles of bromine
a pure gold ring and pure silver ring have a total mass of 163 g the two rings are heated to 661 c and dropped into a
what is the freezing point of a solution that contains 100 g of glucose c6h12o6 in 100 g of h2o kf for water is
calculate the theoretical amount of nh4no3 that would be required to change the temperature of 50 ml of water from room