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1 what is the thickness in mm of the sheet formed by atoms of lead the density of lead is 1135 gcm3a 00910 b 188 times
a sample of co2 has a mass of 50 grams what is the number of molecules of carbon dioxide in the 50 gram
a student places 2201 grams of co2 gas into a balloon at 302 k and 103 atm what is the volume of the
calculate the mass of ferrous ammonium sulfate you would need to add to a 10000 ml volumetric flask to make a solution
a calculate the volume occupied 150g 700g of o2 and cl2 react when mixed without exerting a pressure 482atm to 22
write a net ionic equation for the precipitation reaction resulting from mixing a bacl2 solution with a k2so4
a a sample of he g holds 500ml to -185 degrees celsius and 750 torr at what temperature in celsius gas occupy 350ml if
a hypersaline solution with a molality of 368m has a salt content so high that the mass of the solution per 1000 grams
the freezing point of a solution of acetic acid and water is -0278c what is the molality of the
the standard enthalpy of formation of zn2 aq is -1539kjmole how much heat is evolved when 03724 g of zns reacts with
mixed in a constant-pressure calorimeter the temperature of the mixture rose from 2115 to 2600 if the density of the
of the calorimeter to rise from 2200c to 3475c how much heat in kj did this reaction release the heat capacity of the
when the metal was placed in a constant-pressure calorimeter containing 300g of water the temperature of the water rose
is the skeleton of caffeine flat how might the structure of caffeine account for the fact that it sublimes at
the vapor pressure of phosphoryl chloride difluroride opcl2f2 has been measured as a function of temperaturetemperature
how many moles of ions are found in 345 ml of a solution containing 422 gl aluminum
nicotine a component of tobacco is composed of rm c rm h and rm n a 3675 -mg sample of nicotine was combusted producing
the forensic technician at a crime scene has just prepared a luminol stock solution by adding 170 g of luminol to h2o
magnesium metal is easily deformed by an applied force whereas magnesium fluoride is shattered why do these two solids
a solid substance x has a vapor pressure of 300mm hg at 25oc and does not conduct electricity solid substance y has an
1 a covalent crystal differs from an ionic crystal in thata only one of them is a poor electrical conductorb only one
1 which is stronger-the convalent bond that holds atoms together in the molecule or the electrical attraction between
draw electron-dot structures for the following molecules which contain atoms from the third row or
calculate the ph at the equivalence point for the titration of 25 m ch3cooh with m naoh for ch3cooh
vitamin c contains 4092 c 458 h and 545 o by mass what is the empirical formula of vitamin