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require to prepare 1000 ml of a ph400 buffer solution using 0100 m benzoic acid pka 420 and 0200 m sodium benzoate
suppose heat a 1000m3 room from 20c to 30c by using a heat pump presume the heat is achieved completely by the air at a
ag is added to a solution of 00018 m cl- and 00018 m scn- define the agscn precipitates first ksp 10 times 10-12
three student chemists calculated 500 ml of 100 m naoh in separate styrofoam cups calorimeters brett added 500 ml of
in a periodic table the element hydrogen is occasionally grouped with the alkali metals and sometimes with the halogens
ferrophosphorus reacts with pyrite producing iron ii sulfide as well as a compound that is 2787 p and 7213 s by mass as
the nitrate stock standard utilized in this experiment is 1000ppm no3- prepared by dissolving 163mg of dried kno3 in
oxygen ions in space- the far ultraviolet spectroscopic explorer fuse satellite has been analyzing the spectra of
assume that 2419 g of ice at -75degc is placed in 7199 g of water at 996degc in a perfectly insulated vessel compute
a mixture containing 0538 mol heg 0315 mol neg and 0103 mol arg is confined in a 700-l vessel at 25 degree celcius
position the subsequent ionic compounds in order of decreasing amount of energy released in lattice formation- naf bao
compute the amount of energy required for the formation of one mole of bao bonds not lattice energy the radius of the
for several years the recovery of gold - that is the separation of gold from other materials - involved the utilization
if a 218 g sample of ethanol c2h5oh is burned in a bomb calorimeter according to the subsequent reaction if the
explain hclo is a weak acid ka 40 times 10-8 as well as so the salt naclo acts as a weak base explain what is the ph
nitric acid is not merely a strong acid however also a strong oxidizing agent in hot concentrated acid solution the
if a 368-g sample of water absorbs infrared radiation at 106x104 nm from a carbon dioxide laser presume all the
explain drawing the key resonance contributor of one or both of the conjugate bases as well as curved arrows showing
determine the reaction when aqueous solutions of potassium carbonate as well as zinc sulfate are combined explain the
1 determine the reaction when aqueous solutions of zinc acetate and ammonium sulfate are combined the net ionic
define by drawing the key resonance contributor of one or both of the conjugate bases in question including curved
state the balanced net equation for the reaction that takes place when 01 m solutions of potassium sulfide and chromium
state the balanced net equation for the reaction that takes place when 01 m solutions of lead ii nitrate and lithium
state the balanced net equation for the reaction that takes place when 01 m solutions of potassium chromate as well as
state the balanced net equation for the reaction that takes place when 01 m solutions of copper ii sulfate and calcium