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define a flask contains 250ml of a 0125 solution of na3po4 if a sample containing 0250 moles of na is added to the
if a 45kg sample of water absorbs 345kj of heat if the water was initially at 221 degrees celsius define what is the
if 22 ml of 70 m h2so4 was spilled define what is the minimum mass of nahco3 that should be added to the spill to
while a solution containing 14g of bano32 as well as 24g of nh2so3h is boiled a precipitate forms this precipitate may
if 22 ml of 70 m h2so4 was spilled explain what is the minimum mass of nahco3 that must be added to the spill to
while a solution containing 14g of bano32 and 24g of nh2so3h is boiled a precipitate forms this precipitate may be
if the nutritional calorie is equivalent to one kcal one pound of body fat is equal to about 41 x 103 caloriesexpress
a typical buffer utilized by biochemists is called tris which can be depicting as r3n a buffer that is makes by mixing
explain if you were conducting a gas volumetric analysis explain how would your calculations to achieve the mass
explain a compound contains only carbon hydrogen and oxygen combustion of 001068 g of the compound yields 001601g co2
if 40 mols of co gas at 50degc is mixed with 60 mols of co2 gas at 50degc explain the mixture is heated to a final
explain what is the molarity of a baoh2 solution 805ml of which neutralizes 1000ml of 0204m
presume that a lemon contains 100 of citric acid explain how many milliliters of 0115m naoh will be required to titrate
while 040 g of impure zinc reacted with an excess of hydrochloric acid 127 ml of hydrogen was collected over water at
explain the development of the modern periodic table comprise contributions made by lavoisier newlands mendeleev and
compute the ph of a solution containing 08 moles of chloroacetic acid and 04 moles of sodium chloroacetate in one liter
determine a mixture of the gases n2o4 and 2n02 at 25 c and 1 bar the density of n204 is 376gl and the density of the
they hydrogen atom isnt actually electronegative sufficient to form bonds to xenon explain were the xenon-hydrogen bond
a explain pure lead melts at 327oc and pure tin melts at 232o c yet while we make an alloy of lead-619 wt sn it melts
explain a 368-g sample of water absorbs infrared radiation at from a carbon dioxide laser presume all the absorbed
1 the silver nitrate dissolves in water to form a colorless solution state the formulas of the species present in
define below is a carbocation intermediate in an electrophilic addition reaction of hcl with two different
utilize enthalapies of formation to compute the standard enthalpy of reaction for the subsequent methane-generating
older glucometers rely on colormetric detection the modern glucometers rely on a different detection method for
presume that 102 g of rubbing alcohol c3h8o evaporates from a 570 g aluminum block explain if the aluminum block is