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calculate the change in entropy when 25 g of ethanol at 50oc is poured into 70 g of ethanol at 10oc in an insulated
how are the daughter ions or fragments formed in mass spectrometry and why are these fragments helpful in identifying
a system contracts from an initial volume of 150 l to a final volume of 100 l under a constant external pressure of
what problems might we see if we increase the energy of the electron beam and if we reduce the energy of the electron
the enthalpy of combustion for propane is -2044 kjmol how many liters of propane at stp must be burned in order to
what are the three basic steps in mass spectrometry also why are the analyte molecules
a 250 ml sample of 0150 m chloroacetic acid is titrated with a 0150 m naoh solution what is the ph at the equivalence
a 2154 ml volume of 0130 m naoh is required to reach the stoichiometric point for the titration of 2500 ml of a 0112 m
why is the gc so commonly used in cooperation with a mass spectrometer also what type of limitations do we face if we
a for a weak acid eg ch3cooh that is titrated with a strong base eg naoh what species ionsmolecules are present in the
a 239g sample of a metal was heated to 6156 degrees c when the metal was placed in a constant-pressure calorimeter
in class we preformed an equilibrium constant lab measuring an equilibrium constant for an esterification reaction
draw the structures of all of the diferent alkenes produced from an e2 elimination on 2-bromo-34-dimethylpentane
what is the ph change of a 0220 solution of citric acid if citrate is added to a concentration of 0175 with no change
write a balanced equation for the following reaction gaseous propane c3h8 burns in oxygen to form gaseous carbon dioxid
draw all substitution products for the reaction of 1-iodo-2-methylcyclohexane with methanol the products should all be
1 what is the common ion effect select all that applya the increase in solubility that occurs when a common ion is
a single crystal of silver with critical resolved shear stress of 80 mpa is oriented such that tension is applied along
the pressure inside a soda bottle is two atmospheres 1520mm hg if exactly half this pressure is generated by co2 what
a snickersreg candy bar contains 280 calories of which the fat content accounts for 120 calories what is the energy of
the rate equation for the decomposition of n2o5 is raten2o5 the value of k is 67e-5 seconds for the reaction at a
the solubility of p-dibromobenzene in benzene is 80 microliters100 microliters at 25 degrees c p-dibromobenzene also
explain why tropical rainforest is considered to have a very high ecological