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suppose that a compound x can be made from the reaction of two other compounds a and z a write a balanced equilibrium
which reaction responds more strongly to changes of temperature one with an activation energy of 52 kj mol-1 or one
what is the mole fraction of helium xhe in a gaseous mixture of he and ar for which the average molar mass is found to
the rate constant for a reaction increases by a factor of 141 when the temperature is increased from 20 degc to 27 degc
a reaction has a second-order rate law with kr144 dm3 mol-1 s-1 calculate the time required for the concentration of a
determine the pressures of one gram each of gaseous h2 he n2 and ar where each sample is contained in a volume of one
the half life of a first-order reaction was found to be 439 s what is the time constant for the
in 1911 hans geiger and ernest marsden working under ernest rutherford conducted an experiment involving alpha
a galvanic cell is produced as follows left half-cell has a pt wire dipping into a beaker containing an equimolar
given the following acids or bases 1 h2so3 2 hpo4-2a write the acid reactions for each of the above b write the ka
sodium sulfate is slowly added to a solution containing 00500 m ca2 aq and 00370 m ag aq what will be the concentration
it is essential to keep a relatively constant ph level in your blood this is maintained by a number of buffers such as
a 160 l gas cylinder has been filled with 520 moles of gas you measure the pressure to be 440 atm what is the
a 0150-mole quantity of nicl2 is added to a liter of 120 m nh3 solution what is the concentration of ni2 ions at
a 300 l kiln is used for vitrifying ceramics it is currently operating at 1065 degrees celsius and the pressure is
a 140 l gas cylinder is filled with 800 moles of gas the tank is stored at 9 degrees celsius what is the pressure in
the density of platinum metal is 21450 kgm3 find the weight in pounds of a cube of platinum that measures exactly 1
a balloon is floating around outside your window the temperature outside is 21 degrees celsius and the air pressure is
a 1000ml of sample of drinking water was buffered at ph 100 and after the addition of calmagite indicator required
how many hours will it take to produce 470 kg of al metal by the reduction of al3 in an electrolytic cell using a
calculate the cell emf for the following reaction 2ag030 m h21 atm 2ags 2hph 70 need step by step
when the concentration of zn2 ion is 045 m the measured voltage of the zn-cu zell is 040 v what is the cu2 ion
calculate the heat of formation of magnesium oxide mgo data given are mgs 2hcl aq gt mgcl2 aq h2 g h 462 kjmol mgos
combustion of a 150 g sample of a hydrocarbon produces 488g of co2 and 15 g h2o what is the empirical
if the initial concentration of h2o was 0700m and after 54mins the concentration is measured to be 00875m what is the