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how much energy is required to heat 100 g of ice from -50 to 50 degrees c the heat of fusion of water is 601 kjmol and
the crystal lattice enegery for librs is -8186 kjmol at 25 degrees celcius the hydration energy of the ions of libr is
give structures and names of all benzene derivatives that theoretically can have the indicated number of derivativesa
arrange the following elements in order of increasing atomic size and explain how you know the orderca rb s si ge
calculate the number of moles in 750g of leadii perchlorate trihydrate pbclo42
how much heat is required to raise the temperature of a stainless steel pot weighing 450 g and containing 270 g of
1 describe in detail reagent solvent you can employ to prepare otto diels and kurt alder reaction note that this
the alcohol content of hard liquor is normally given in terms of the proof which is defined as twice the percentage by
calculate the volumetric size of a water molecule in vapor assuming 1 mole of the vapor occupies 224 l as if the vapor
a solution of an unknown nonvolatile electrolyte was prepared by dissolving 0250 g of a substance in 40 g of ccl4 the
the isomerization of methyl isocyanide ch3nc ch3cn follows first-order kinetics the half-lives were found to be 161
make a table showing the gram quantities and mole quantities of each reagent required in the diels alder reaction
a solution is prepared by dissolving 129 g of an unknown organic compound in 1500 g of cyclohexane what is the molar
a 150 g sample of liquid water is sealed in a 1520 ml flask and allowed to come to equilibrium with its vapor at 27
how much heat is required to raise the temperature of 205 g ch3ohl from 220 to 300 c and then vaporize it at 300 c use
which of the following will give the largest increase in boiling point when added to 1 kg of water 1 mol cono32 2 mol
for ch2cbr2 which geometric isomers do you suppose is energetically most stable containing less repulsion energy cis or
potassium nitrate has a lattice energy of -1638kcalmol and a heat of hydration of -1555kcalmol how much potassium
explain why the beer-lambert law stating that light absorbance is proportional to concentration eventually becomes
choose the amino acid in the following pairs that would be more likely to appear on the solvent-exposed surface of a
you have 1000 ml of 0100 m aqueous of each of the following acids hcn hf hcl and hc2h3o2 you titrate each with 0100 m
if the density of a 400 mass solution of ethylene glycol in water is 10514 at 20 degrees celsius what is the
use the dipole moments of hf and hcl following together with the percent ionic character of each bond to estimate lewis
how many grams of nabr must be added to 250g of water to lower the vapor pressure by 130 mmhg at 40 degrees celcius