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the heat of solution of ammonium chloride is 152 kjmol if a 6134 g sample of nh4cl is added to 650 ml of water in a
please explain an element has the following natural abundances and isotopic masses 9092 abundance with 1999 amu 026
please explain the gas tank of a certain luxury automobile holds 223 gallons according to the owners manual if the
for a classroom demonstration a chemistry teacher puts 5 ml of water into a soft plastic pop bottle and with tongs
a small glass bead weighs 287 mg and a small marble weighs 842 g a quantity of small glass beads weighs 509 kg what
please explain the differences between the symbols for the element sulfur and the formula for a molecule of
consider a process that is spontaneous at high temperatures but becomes non spontaneous at low temperatures the sign
when performing an n-doping for a molecule atoms with higher valence electron atoms are used here does it matter if the
what effect will increasing the volume of the reaction mixture have on the system what is the change in entropyconsider
a container contains 317g of co2g the partial pressure of co2 is 280 atm and the volume of the container is 324l so
from the moles of carbon dioxide calculate the moles and mass of carbon producednbspcalculation we must understand that
if the masses of each element present would sum to be the mass of vanillin that was combusted determine the mass and
the bodies of adult humans are composed of 55-60 water on specific heat and heat transfer how does the water help us to
in the balanced chemical reaction the coefficients represent the mole relationship of each substance needed or produced
a given 5000 g of sodium hydroxide how many moles of sodium hydroxide do you haveb what is the molar ratio
an unknown organic compound gave the following elemental analysis data c 6663 h 1118 and molecular weight 72107
is 1s2 2s2 2p6 the symbol for a macroscopic property or a microscopic property of an element explain your
a non-volatile solute depresses the freezing point of cyclohexaneby 4 degrees celcius if cyclohexane has the
a solution is prepared by mixing 00300 molch2cl2nbspand 00500 mol ch2br2nbspnbspat 25degrees c assuming the solution
you transferred 20 ml of acetic acid solution to an erlenmeyer flask and added 2 drops of phenolphthalein solution you
for the reaction hg2aqnbsp 4i-nbspaq harrhgi42-aqnbsp the overallformation constant of hginbsp42-nbspis 10 x 1030what
fluorine reacts with sodium chloride in a single displacement reaction if 25 mol of fluorine gas are used how many
a mixture containing 39 moles of no and 088 mole ofco2nbspwas allowed to react in a flask at a certain temperature
the hydrolysis of sucrose to fructose is first order in sucrosewith a half-life of 26e03 s at some temperaturewhat
a 505-g piece of copper tubing is heated to 999 degrees c and placed in an insulated vessel containing 598 g of water