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two identical tubes are open at the top and are connected at the bottom via a tube of negligible volume and a valve
consider an idealgas at 27 degrees c and100 atm pressure imaginethe molecules to be on average uniformly spaced with
a 75-kg athlete does a single-hand handstand if the area of the hand in contact with the floor is 125 cm2 what pressure
an object is dropped from rest from aheight of 40 million meters above surface of the earth if there isno air
a marine radar operates at a wavelength of 32cm and a powerof 70kw per pulsea what is the frequency of the radar wavesb
cpm for chcl3 is 9147 75x10-2t jk mol in a limited temperature range one mol of this compound at 325 k is cooled at
a 4 l volume of a perfect gas at 3000 k and 100 bar pressure undergoes a reversible isothermal compression until the
a total of 31 bright and 31 dark newtons rings not countingthe dark spot at the center are observed when 550 nm light
a one-mole sample of a monatomic perfect gas with a constant pressure heat capacity of 2085 jk mol is initially at a
a 500 ml sample of 100 m aqueous cuso4 was added to 500 ml of 200 m aqueous koh in a non-ideal coffee cup calorimeter
a sample of 755 moles of nitrogen gas is maintained at aconstant pressure of 100 atm in a flexible containerthe gas is
consider the following two-step process heat is allowed toflow out of an ideal gas at constant volume so that its
in this experiment 0150 g of a mixture containing 0100 g of a neutral unknown compound and 0050 g of a benzoic acid
calculate the enthalpy of reaction at 490 k you may assume that the heat capacity is constant and corresponds to the
a small circular hole 690 mmdiameter is cut in the side of a large water tank 190 m below the water level in the tank
use acid-base concepts to comment on the fact that the only important ore of mercury is cinnabar hgs whereas zinc
in the van der waals equation of state the constant brepresents the amount of unavailable volume occupied by
what mass of carbon dioxide is produced from the complete combution of 100x10-3 of
a hospital patient receives a quick 500-cc blood transfusion through a needle with a length of 50 cm and an inner
a 2700 g piece of iron and a 2020 g piece of gold at 100 degrees c were dropped into 6800 ml of water at 1635 degrees c
a glass camera lens with an index of 155 is to be coatedwith a cryolite file n130 to decrease the reflection ofnormally
two trains are traveling toward each other at 310 ms relative to the ground one train isblowing a whistle at 1230 hza
the following experiment is used to determine the amount of helium gas in the container in the experimentv 6050 lh
which one of the following polyprotic acids is the weakest acid in terms of its first acid-ionization equilibrium
calculate the wavelength in nanometers of the radiation released when an electron moves from n 6 to n