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what is the half-life of a compound if 60 percent of a given sample of the compound decomposes in 54 min assume
calculate the ph of 0100 l of a buffer solution that is 025 m in hf and 050 in naf what is the change in ph on addition
a mixture of 1374g of h2 and 7031g of br2 is heated in a 200 l vessel at 700 k these substances react as follows h2g
methanol ch3oh is produced commercially by the catalyzed reaction of carbon monoxide and hydrogen cog 2h2g lt---gt
what will be wavelength required for a baseball mass 149 g traveling at a speed of 416
calculate the wavelength in meters use the abbreviation not the whole word of an electron traveling at a speed of 806
at constant volume the heat of combustion of a particular compound is -35490 kjmol when 1441 g of this compound molar
liquid sodium is being considered as an engine coolant how many grams of liquid sodium minimum are needed to absorb 590
write two equations to show the reaction of 4-methylcyclohexene with a br2ch2cl2 b
provide the mechanism showing all steps and curved arrows for the dehydration of 4-methylcyclohexanol in the presence
2ags f2g 2agfs h -4092 kja if 2 atoms of silver metal react with 1 molecule of fluorine gas at constant pressure 2
starting with 1 liter of 20 m ch3cooh acetic acid we wish to make a buffer solution of ph400 consider the following to
the specific heat of ethylene glycol is 242 jg-k how many j of heat are needed to raise the temperature of 620 g of
a completely mixed reactor cstr cmfr is to be used to treat an industrial wastewatera a tracer study is conducted to
you have an application that requires a single crystal metal rod to support a tensile load along the long axis without
a single crystal of silver with critical resolved shear stress of 80 mpa is oriented such that tension is applied along
with a mixture containing metal cations cu 2 charge cr 2 charge and fe 3 charge all of which are attached to a no3
the overall reaction for the halogenation of a hydrocarbon rh using br as the halogen is rh br2 gt rbr hbr the
the specific heat of iron metal is 0450 jg-k how many j of heat are necessary to raise the temperature of a 105-kg
the problem is about a solution in second order that the original ao 0100m 20 of the reaction is completed in 40
when an ionic solid dissolves in water water molecules attract the ions causing them to dissociate of come apart the
calculate the minimum ph needed to precipitate mnoh2 so completely that the concentration of mn is less than 1
2816 g sample of khp required 2968 ml of sodium hydroxide to reach the phenolphthalein point calculate the molarity of
calculate the ph if 2 mol hcl is added to5 l of a butter solution that is 28 m nh3 and 22 m nh4cl for nh3 the