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the solid is not completely submerged in te water will this technique error ingrease decrease or have no effect on the
if everyone in the world population 7 x 109 wanted to heat up the water for a 20oz cup of coffee from 20deg c to 95deg
when 450 grams of a certain metal at 70 degrees celsius is added to 240 grams of water at 100 degrees celsius in an
you are given solutions of hcl and naoh and must determine their concentrations you use 268 ml of naoh to titrate 100
the unknown liquid is volatile if some of the liquid evaporates between the time the liquid is delivered to the beaker
if 345 ml leadii nitrate solution reacts completely with excess sodium iodide solution to yield 0690 g precipitate what
potassium carbonate k2co3 sodium iodide nai magnesium oxide mgo methanol ch3oh and ammonium chloride nh4cl are soluble
an unknown metal m reacts with s to form a compound with a formula m2s3if 312g of m reacts with exactly 288g of sulphur
acetic acid is added to water until the ph reaches what is the total concentration of the added acetic
once you make a 100ml of 02m solution with 2422 g of substance if you take 10 ml of that solution you just made and add
if a solid is not completely submerged in the water will this technique error increase decrease or have no effect on
at 900k the following reaction has kp0345 2so2 o2-gt2so3 in an equilibruim mixture the partial pressure of so2 and o2
at 218 c kc12x10-4 for the equilibruim nh4hs-gtnh3 h2s calculate the equilibruim concentration of nh3 and h2s if a
consider a colloidal suspensionlike a solution of very small particles in a solvent we may think of this as an ideal
an ideal gas is compressed reversibly at a constant temperature the compression reduces the volume b 180l the final
consider that the human brain weighs about 1 kg and contains 1011 cells assuming that each cell is entirely filled with
what is the yield of the reaction if a student reacted 200 g of salicylic acid with excess acetyl chloride and after
how many 325 mg aspirin tablets are needed for a 120 lb patient if the recommended dose is 650 mg of aspirin per kg of
a pharmaceutical company needs to prepare a batch of 5000 bottles containing 80 tablets each with 325 mg of aspirin per
the boiling point elevation of a solution consisting of a nonvolatile solute in 907 g of benzene is 6348 degrees
50ml hcl reacted with 50ml naoh and the change in temperature was 67oc will the temperature change increase or decrease
does doubling the volume not concentration of acid and base double the amount of heat produced in a neutralization
a sample of gasoline was run through the gc yielding several peaks indicating the components that made up the gasoline
the rate constant k for a reaction was measured as a function of temperature a plot of ln k versus 1t in k is linear
why are masses in the chemistry laboratory usually determined by a difference methodusing a beaker to contain the