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buffer capacity refers to the amount of acid or base a buffer can absorb without a significant ph change it is governed
why is it impossible for 100 pure ethanol to be obtained from fractional distillation of the fermentation
what is the longest wavelength of light that can break the o-h bond the bond dissociation energy of an o-h bond is
12cl2g32f2g rarrclf3gthe bond energies of cl2 and f2 are 242kjmol and 155kjmol respectively calculate the bond energy
draw lewis structure for one important resonance form of hno3 hono2 include all lone pair
when 150 ml of 0400 m h are mixed with 200 ml of 0500 m oh- the final temperature of the solution is 265degc what was
the melting point range is measure for two materials a and b for material a the melting point range is from 585 c to
write a complete set of quantrum numbers nl and m that quantum theories allows for each of the following orbital a 2p
a student has three gas samples of the same volume all the gases are at the standard temperature and pressure 273 k and
what wavelength should the astrophysicist look for to detect a transition of an electron from the to the
a hot air balloon occupies a volume of 978 l at a temperature of 27 degc what is the temperature in degc if the volume
calculate the wavelenght and frequencey of light emitted when an electron changes from n4 to n3 in the h atom in what
calculate the maximum non-expansion work per mole that may be obtained from a fuel cell in which the chemical reaction
state which of the following orbitals cannot exist according to the quantum theory 2s2d3p 4f and
an electron moves with a velocity of 25 x10 8 cms what is its wavelengh the 8 next to the cm is suppose to be in
the energy from radiation can be used to cause the rupture of chemical bond a minimum enery of 941 kjmol is required to
what concentration of the barium ion ba2 must be exceeded to precipitate baf2 from a solution that is 10010-2 m in the
what is the total pressure of a mixture of the following gases oxygen with a partial pressure of 221 mmhg nitrogen with
a ballon is filled with h2 gas and has a pressure of 110 atm volume of 102l and a temp of 298 k how many grams of h2
when a 689-g sample of cacl2 dissolves in 250 g water in a coffee cup calorimeter the temperature rises from 220 to 269
a certain pesticide is fatal to fish fingerlings at a level of 050 parts per million in water a leaking metal can
a 643-g piece of aluminum at 94 degc was immersed into 700-g water at 250 degc the water temperature rose to 364 degc
how many g of product are actually used when a chemist calculates the theoretical yeild of a product at 201 g and the
aniline is an organic base used in the manufacture of dyes calculate the in a 012 solution of aniline
when heated potassium chlorate decomposes to yield oxygen and potassium chloride calculate how much heat is needed to