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We know that in olivine the corrdination number of Si is 4 with respect to oxygen. Predict the coordination number of Mg and Fe. What would be the geometry of oxygens surround
Two 2.0-cm-diameter insulating spheres have a 5.70 cm space between them. One sphere is charged to + 87.0 nC, the other to - 84.0 nC. What is the electric field strength at the midpoint between the
How many protons are in the beam traveling close to the speed of light in the Tevatron at Fermilab, which is carrying 12.73 mA of current around the 6.3-km circumference of the main Tevatron ring?
A variable-order reaction with a half-saturation constant 50 mg/L and a maximum rate of 4 mg/L-hr occurs in a batch reactor. If the initial concentration is 10 mg/L, how long is required to ac
Two in-phase loudspeakers emit identical 1000 Hz sound waves along the x-axis. What distance should one speaker be placed behind the other for the sound to have an amplitude 1.10 times that of each
Three of the alkene products have large peaks at a mass to charge ratio (m/z) of 69, the other two alkenes do not show large peaks at this value.
The magnitude of each of the charges is 6.0 µC, and the lengths of the sides of the triangle are 2.0 cm. Calculate the magnitude of the net force that each charge experiences.
Does the reaction between acetone and iodine follow the general rule concerning the relation between a 10-degree increase in temperature and the reaction rate? Explain.
A package is sliding from rest down an incline at an angle "phi", and encounters a rough section that starts at height "2h" and ends at height "h". The starting point for the package is at height "x
Calculate the finaltemperature of a sample of argon of mass 12.0 g that is expand edreversibly and adiabatically from 1.0 dm^3 at 273.15 K to 3.0dm^3.
A carbon wire and a Nichrome wire are connected one after the other. If the combination has total resistance of 13.0 k at 20°C, what is the resistance of each wire (in Kohms) at 20°C so that
The constant-pressureheat capacity of a sample of a perfect (ideal) gas found to varywith the temperature according to the expression Cp / (J/K) = 20.17+ 0.3665 (T/K).
A sample of 1.0 molgaseous water is condensed isothermally and reversibly to liquidwater at 100 C. The standard enthalpy of vaporization of water at100 C is 40.656 kJ/mol. Find the internal energy
A sinusoidal transverse wave of amplitude ym = 8.4 cm and wavelength = 5.3 cm travels on a stretched cord. Find the ratio of the maximum particle speed (the speed with which a single particle in the
A sample consisting of1.0 mol Argon is expanded is othermally at 0 C from 22.4 dm^3 to44.8 dm^3 reversibly. Calculate the energy exchanged through heat with the surroundings.
A 45kg woman stands up in a 60kg canoe 5m long. She walks from a point 1m from one end to a point 1m from the other end. If you ignore resistance to motion of the canoe in the water, how far does th
Two small plastic spheres each have a mass of 2.0 and a charge of -50.0. They are placed 2.0 apart. aa. What is the magnitude of the electric force between the spheres?
A 120-kg tackler moving at 5 m/s meets head-on (and tackles) a 80-kg halfback moving at 5 m/s, after which they couple together. What will be their mutual speed after the collision?
If electrical energy costs 12 cents, or $0.12, per kilowatt-hour, then what would the following events cost? (a) Burn a 100 W light bulb for 24 h straight.
A resistor of unknown resistance and a 43.0-O resistor are connected across a 128.0-V emf device in such a way that an 14.0-A current flows. What is the value of the unknown resistance?
A chemical reaction occurs in a batch reactor. The intital concentration of sompound A is 100 mg/L. The concentration which remains after 10 minutes is 90 mg/L.
Find the coefficient of friction of the surface. (Assume friction is the only horizontal force. Show a force diagram and write down he equations for Newton's second law.)
You allow 75 grams of carbon monoxide to react with 58 grams of hydrogen according to the following process. Determine the limiting reactant and the amount of methanol produced.Co2 (g) + H2(g) equal
The surface of the Sun is appoximately 5,700 K and the temperature of the Earth's surface is about 290 K. What total entropy change occurs when 1,000 J of heat energy is transferred from the Sun to
A 0.3130-g sample of impure Ca(OH)2 is dissolved inenough water to make 52.90 mL of solution. 20.00 mL of the resulting solution is then titrated with 0.2768-M HCl. What is the percent purity o