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A box contains a mixture of small copper spheres and small lead spheres. The total volume of both metals is measured by the displacement of water to be 427cm^3 and the total mass is 4.36 kg . What percentage of the spheres are copper?
mole of naphthalene(C10H8), a solid, is burned in a constant- volume bomb calorimeter at 298K, 5150 kJ of heat is evolved. Calculate delta H for the raction on a molar basis.
An aqueous antifreeze solution is 48.5% ethylene glycol (C2H6O2) by mass. The density of the solution is 1.062 g/cm3. Calculate the molality, molarity and mole fraction of ethylene glycol
The blood buffering system is aided by the enzyme carbonic anhydrase, which interconverts carbon dioxide and water to bicarbonate and H
A turbine operates by the impact of a high velocity jet of steam against the turbine blades. The steam leaves the turbine at a lower velovity.
FOr the balanced equation shown below, how many moles of Fe3O4 will react with 1.02 moles of CO, to form how many moles of FeO
What mathematical expresssion will yield the correct volume at 177 degrees celsius and 400mgHg?
Write and balance net ionic equation for oxalic acid reacting with permanganate ion in acidic solution.
Air is a mixture of N2,O2,Ar,Co2,Ne,He,CH4,lessor amounts of the other gases and possibly substantial amount of H2O in vapor form.
SO3 can be produced in the following two-step process: FeS2 + O2 ---> Fe2O3 + SO2 , SO2 + O2 ----> SO3 Assuming that all the FeS2 reacts, how many grams of SO3 are produced when 20.0 g of the FeS2 reacts with 16.0 g of O2?
How does the attractive force that the nucleus exerts on an electron change with the principal energy level of the electron
gram sample of a gaseous hydrocarbon has a volume of 820 ml when measured at 227 degrees Celcius and 2.50 atm.
A molecule can be polar or nonpolar depending upon the nature of the bonds and the shape of the molecule. For a molecule that has different outer atoms the molecular symmetry will decide the polarity.
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