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lead has melting point of 327 c its specific heat is 013 j gdeg and its molar enthalpy of fusion is 480 kjmol how much
nh3 is a weak base naoh is strong base predict what would appear in a soln if naoh were added to cuso4 solution instead
at 25 degree c the density of a 50 by mass ethanol-water solution is 0914g per cubic cm given the partial molar volume
the blue color of the sky results from the scattering of sunlight by molecules in the air the blue light has a
what is the formula for finding how many isomers are in a given organic molecule like for an alkane alkene and
what is the ph of a solution that is made by combining 125 ml of 06 m hydrofluoric acid with 50 ml of 11 m sodium
although an optical rotation of 123deg can also be read as -237deg is a specific rotation a of 123deg the same as one
2c8h18 25o2 16co218h2o delta heat -10942 kj calculate the mass of octane that must be burned to produce 12mj of
hcl is a much stronger acid than ch3cooh however when 5 drops of 010 m hcl is added to 20 drops of a buffer solution
write a balanced chemical equation depicting the formation of one mole of caco3 from its elements in their standard
calculate the number of grams of mg needed for this reaction to release enough energy to increase the temperature of 73
at what point is a buffer solution no longer effective in resisting a ph change when a strong acid is
silver bromide a pale yellow precipitate is more soluble than silver iodide predict what would happen if 01m nabr had
the combustion of 04196g of hydrocarbon releases 1755kj of heatthe masses of the products are co21419g and h20 0290g
is the conversion of the hydrate to its anhydrous salt an example of a physical change or chemical change
consider the following potential sources of error in an experiment designed to calculate the value of x in mgso4 x h2o
if a certain gas occupies a volume of 20 l when the applied pressure is 10 atm find the pressure when the gas occupies
a chemistry graduate student is designing a pressure vessel for an experiment the vessel will contain gases at
a hno3 a strong acid is added to shift the ag2co3 equilibrium to the right explain why shift occurs b what would have
nh3 is a weak base naoh is a strong base what would happen if naoh were added to cuso4 solution instead of
a student mixes 886g of water at 743 degree celsius with 579g of water at 248 degree celsius in an insulated flaskwhat
given that one mole of naoh reacts exactly with one mole of potassium hydrogen phthalate write the chemical reaction
a sample of a radioactive substance used in detecting skin cancer produced 592 counts in one minute at the beginning of
consider the titration of 300 ml of 010m hclo ka50x10-5 with 0095m koh solution determine the ph ata initially before
write equations that describe the reaction mechanism for the acid hydrolysis of each of the following compoundsb acetic