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In the manufacturing of computer chips cylinders of silicon are cut into thin wafers that are 3.00 inches in diameter and have a mass of 1.50g of silicon. How thick, in millimeters (mm) is each wafer if silicon has a density of 2.33 g/cm3. The volume of a cylinder is V= Pi (times) (R squared) H
How many atoms are contained in a titanium sphere having a diameter of 18 mm? The density of titanium is 4.506 g/cm3. Calculate the volume of 5.2 mol of water. Assume that the density of water is 1 g/mL.
Describe the preparation of 1 liter of a 0.75M acetate buffer, pH 4.50, starting from a 1.50 M solution of acetic acid and solid KOH pellets, M.W.=56 (pKa=4.75)
The watt is the derived SI unit of power the measure of energy per unit time: 1W =1 J-s. A semiconductor laser in a CD player has an output wavelength of 780nm and a power level of 0.10mW.
Suppose water boils at 277 C when the pressure is 6128kpa and at 329C when the pressure is 12688kpa. Contrast the efficiencies of 2 Carnot steam engines under the above conditions with each operating at Tc= 25C.
11 g of sodium bromide NaBr is mixed with 9 g of butanol CH3CH2CH2CH2OH to yield 258 mg of bromobutane CH3CH2CH2CH2Br. Under the catalysis of 10 ml of sulfuric acid density 1.84g/ml.
how many molecules of carbon dioxide are produced when 145 molecules of acetylene hcch to react in excess oxygen
Presume that we have a mixture of N2 (g) and O2 (g) of unknown composition whose total pressure is 385torr. If all the oxygen as is distant from the mixture by reaction with phosphorus, which doesn't react directly with nitrogen, subsequently the ..
How much heat is produced by the complete combustion of 256 CH4 of ? CH4+2O2=CO2+2H2O Hrxn=-802.3kJ
using the concepts of chemical kinetics explain why food kept in the refrigerator or freezer does not spoil as quickly
The individual standard electrode potentials do not indicate anything about tendency to gain electrons. The cell potential of the entire cell does.
Compute the number of mol of S represented by 1.810 x 10 -27 atoms of S, also determine the number of atoms of sulfur in 5.22 x 10 -7 kilograms of sulfur.
Methanol is toxic for humans if they ingest liquid methanol or inhale methanol vapor in significant quantities. When inhaled in concentration greater than 1000 ppm, death has been reported.
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