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a sample of hydrogen gas h2 has a volume of 50 l and a pressure of 10 atm what is the new pressure in atmospheres if
an xray photon of wavelength 0989 nm strikes a surface the emitted electron has a kinetic energy of 969ev what is the
what is the safest metal to use with a number of cleaning agents even just h2 0 the heavier it is the better the
you are presented with identical metal containers of about 5 liters capacity each about half full of fuel the
ds2 -cos2betadt2 - 2sin2betadrdt cos2betadr2 r2dtheta2 r2 sin2thetadphi2here beta betar take xo t x1 r x2 theta
the specific heat of tungsten is 003 calgc if a 50 gram sample of tungsten absorbs 100 calories of heat what will be
a saturated solution of baso4 at 250c contains 39 10 -5 moleliter of ba2 ions what is the ksp of this salta 39 10-5b 39
bromine has two naturally occurring isotopes one of them bromine -79 has a mass of 789183 u and an abundance of 5069
the atomic number of an element x is 14and its relative atomic mass is 28 how many neutrons does an atom of x contain
a flask in a sealed room that is devoid of oxygen contains 1605 g of magnesium silicide an acid ha where a is a halogen
an underground storage tank was used to store toluene over a period of time some of the toluene leaked from the tank
the next three 3 problems deal with the titration of 421 ml of 0501 m carbonic acid h2co3 ka1 43 x 10-7 ka2 56 x
a laboratory test for gastric acidity calls for 01 naoh prepare 400ml of a 10x stock solution of this reagent using two
dry ice is solid carbon dioxide it vaporizes at room temperature and normal pressures to the gas suppose you put 266 g
a compound has a molecular weight of 1532 and a henrys constant of 85 atm what is the concentration of the compound in
what is the chemical equation with the states for lead and sodium sulfide i know what both of the reactants are but i
copperii carbonate is heated in a test tubegas produced is passed in lime water through a delivery tube62g of copperii
calculate the frequency of the radiation required to eject photoelectrons to a velocity of 9 x105 ms-1 from sodium
what is the equations for the reactions occurring at the electrodes during electrolysis of the following solutionsa
how many grams of nitrogen and oxygen are dissolved in 125g of water at 200c when the water is saturated with air in
suppose we start with co2 and h2 both at a concentration of 0100 m when the system reaches equilibrium what are the
the common eastern mole a mammal typically has a mass of 78 g which corresponds to about 78 moles of atoms a mole of
a flow or 12 mgd is to be treated with 18 percent solution of hydrofluosilicic acid the water to be treated contains no
a mixture weighing 6000 grams contains 4150 na3po4 and 5850 bacl2 of the mixture by weight when dissolved in water a
calculate the yield from an experiment that produced 585 grams of nitrogen gas from the combustion of 6692 grams of