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a 373-g sample of an unknown metal initially at 2070oc is immersed in a 100-g sample of water specific heat 4184 j g-1
what mass of heptane c7h16 is required to produce 902 kj of heat at constant pressure from its combustion in excess
calculate the ph of the solution which results from adding 3854 ml of 01012 m koh to the cyanic acidcyanate buffer of
a buffer is prepared by dissolving 400 g benzoic acid c6h5cooh ka 63 x 10-5 and 400 g sodium benzoate c6h5coona in
in a qualitative analysis procedure a chemist adds hcl to an unknown group of ions and then saturates the solution with
if 500ml of 160m hcl was added to 500ml of 180m naoh calculate the molarity of the resulting nacl solution hint
what is the concentration in ppm of sodium fluoride in tap water that has been fluoridated by the addition of 32 of for
calculate the ph of the solution resulting from the addition of 100 ml of 010 m naoh to 500 ml of 010 m hcn ka 49 x
dinitrogen monoxide decomposes into n2 and o2 suppose you have a reaction flask that initially contains only n2o at a
a coffee cup calorimeter contains 3370 g of water at 198 degrees celcius then 4144 g of water with an initial temp of
how many grams of hydrogen are required to completely saturate 75g of oleic acid c18h34o2 which has one double
within the bohr model of the hydrogen atom the radius of the orbit for the ground state was 5292 x 10-11 m using de
butane is normally supplied in metal containers under pressure as a mixture of liquid and gas so high temperatures may
at 20 0c and 35 bar pressure ethane exists as both a liquid and a gas use the redlich-kwong equation to determine the
the ph of a 300 gram solution of naoh is 1297 the density of the solution is 110 gml how many grams of naoh are in the
the importance of the hydroxyl radical in reacting with and eliminating many atmospheric pollutants however the
calculate the ph at the equivalence point in titrating 0120 m solutions of each of the following with 70times10-2 m
copper has two naturally occuring isotopes 63cu isotopic mass 629396 amu and 65cu isotopic mass 649278 amu if copper
the temperature of 1000 ml of water was raised from 267 degrees celsius to 623 degrees celsius how much heat in
according to the equation how many grams of sodium acetate will you need to add to 125 ml of 0100 m acetic acid to make
the henrys law constant of co2 in water at 250c is 0167x109pa if the partial pressure of co2 over water is 1 bar
find the uncertainty in position in m associated with a 650 kg automobile that is moving at 55 kmhr the uncertainty in
hydrogen cyanide hcn is a poisonous gas that is used in gas chambers for the execution of those sentenced to death it
why does the enolate of acetone attack the carbonyl of cinnamaldehyde rather than the carbonly of another acetone
how will density meltingand boiling point temprature hardness elastisityexpansionconductivity been infulance atomic