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a 321 g iron rod initially at 216circ c is submerged into an unknown mass of water at 640circ c in an insulated
when 515 ml of 077 m nh43po4 and 150 ml of 109 m mncl3 are mixed a precipitate is formed write the balanced molecular
if a molecule having an ionization energy of 1096 ev produces a photoelectron having a kinetic energy of 677646e-19 j
calculate the ph at the equivalence point for the titration of 010 m perchloric acid pkb for nh3 474 consider the
when 0512 grams of a substance is dissolved in 703 grams of naphthalene the solution has a freezing point of 75 degrees
if a 456-g sample that is 985 k2cr2o7 by mass is allowed to react with 305 ml of hcl with a density of 115 gml and 301
if the total number of electrons in a homonuclear diatomic molecule is 13 what is the overall bond order of the
at what optimum ph would you recommend to separate cytochrome c pi 106 from the mixture of myoglobin pi 70 ribonuclease
the reaction of 3-methyl-2-butanol with concentrated hydrobromic acid gives the two isomers bromoalkenesusing curved
draw a reaction profile to illustrate the conversion of 2-methyl-2-butanol and hcl to 2-cloro-2-methylbutane and water
180 ml of hcl was required to titrate 100 ml of a 100 by mass naoh solution density11 gml what is the concentration of
calculate the ph of a solution containing 015 m acetic acid and 025 m sodium acetate for acetic acid ka 18 x 10-5
a piece of metal weighing 510 g at a temperature of 486 c was placed in a calorimeter containing 2000 ml of water at
when ultraviolet radiation of wavelength 584nm from a helium lamp is directed on to a sample of krypton electrons are
when a 325g sample of solid sodium hydroxide was dissolved in a calorimeter in 1000 g of water the temperature rose
given a mixture of gases that contains 55 moles n2 and 20 moles co2 what is the partial pressures of each gas if the
how many grams of ethanol c2h5oh mw c2h5oh 4607 gmol would have to be burned to produce 450 kj of
oftern solutions can be hazardous in ways that are not necessarily related to ther acidity of basicity briefly comment
titration of 50 ml of a wastewater sample with 00737 m edta yielded a calmagite endpoint after addition of 1213 ml of
a compound containing nitrogen and oxygen is decomposed in the laboratory and produces 178g of nitrogen and 405g oxygen
if a volume of 5577 ml hcl is used to completely neutralize 1892g na2co3 according to this equation what is the
the energy from radiation can be used to cause the rupture of chemical bond a minimum energy of 941 kjmol is required
calculate the heat q and determine whether heat is absorbed or released when a system does work on the surroundings
b0lecic acid yields steric acid 0n catalytic hydrogenation ozonolysis of bolecic acid yeilds the following products ch2
draw and label a double helix strand of gtac and its cpmpilmentry matchiong strand indicate all hydrogen bonds with