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a 250 g sample of a bronze gong was cut out and dissolved in suklfuric acid the copper sulfate produced was mixed with
hydrobromic acid aluminum hydroxide -gt water aluminum bromide was double displacement but i got it wrong what type
a 129 molar aqueous solution of ethanol at 20 degrees celcius has a density of 872 gml after dilution with water to 812
a sample consisting of 227g of a nongaseous unstable compound x is placed inside a metal cylinder with a radius of 800
consider a rigid insulated box containing 0400 mol of heg at 300degc and 100 atm in one compartment and 0600 mol of n2g
how much heat is released when 105g of steam at 1000 degrees celsius is cooled to ice at -150 degrees celsius the
a series combination of a 8 komega resistor and an unknown capacitor is connected to a 13 v battery one second after
the formula for the volume of a sphere is v43167r33 assuming a spherical shape calculate the mean diameter of a blood
1 a simple harmonic oscillator has a potential energy of 25x2 joules a kinetic energy of 05v2 joules where x is the
the ozone layer is about 20 km thick has an average total pressureof 10 mm hg13 10-2 atm and has an average
a 600 kg bowling ball is rolling at 900 ms it collides with a 150 kg bowling pin at rest after the collision the pin
a space probe with a rest mass of 81times107kg and a speed of 050c smashes into an asteroid at rest and becomes
calculate the volume of hydrogen bromide that can be prepared by reacting 100 grams of phosphorus tribromide with
a block of mass 4 kg is compressing a spring with k2500 nm a distance of 03 m the block is then released and moves
a gaseous mixture of o2 and n2 contains 388 nitrogen by mass what is the partial pressure of oxygen in the mixture if
a 15-kg playground ball is moving with a velocity of 30 ms directed 30deg below the horizontal just before it strikes a
500 ml of 200 m hcl aq was added to a high quality insulated calorimeter containing 5000 ml of 237 m naoh aq the
the angular momentum quantum number for the two highest energy valence electrons in an atom of lead
determine the density of valence electron in silver assume silver is a simple cubic structure mass density of ag105gcm3
describe how a linear sequence of amino acids gives rise to the three-dimensional structure of proteins detail the
an object moves at a constant velocity of 11 ms to the southwest for an inverval of 20 s halfway through this interval
what will be the percentage of final solution after mixing 20 200 gram nacl solution with 50 100 gram nacl solution
a solenoid 130 m long and 270 cm in diameter carries a current of 120 a the magnetic field inside the solenoid is 150
determine the heats of formation or the steric energies of the exo-and endo-anhydride adducts using a molecular
how many kj of energy are released when 100 g al reacts with fe2o3 as shown in the following equation2 al fe2o3 fe