When the equilibrium concentration of vacancies is present in a crystal at constant temperature and pressure, the Gibbs free energy is at a(n) _____________.
Fill in the blank(s) with the appropriate word(s).
minimum
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Hydrogen and oxygen molecules in a sample of gas have the same temperature. This means the hydrogen molecules, on average, have the same
A) speed and the same kinetic energy. B) speed, but more kinetic energy. C) speed, but less kinetic energy. D) kinetic energy, but more speed. E) kinetic energy, but less speed.
Radiation Activity: What mass of 14C, with a half-life of 5730 y, do you need to provide a decay rate of 280.0 Bq? The mass of 14C is 14.00 u, and 1 u = 1.6605 × 10-27 kg.
A. 1.70 × 10-12 kg B. 5.38 × 10-19 kg C. 3.84 × 10-20 kg D. 8.68 × 10-13 kg
A certain disk can store 600 megabytes of information. If an average word requires 9.0 bytes of storage, how many words can be stored on one disk?
A) 6.7 × 107 words B) 5.4 × 109 words C) 2.1 × 107 words D) 2.0 × 109 words
Energy and Mass: If a typical city consumes electrical energy at a rate of 2.0 GW, how many kilograms of matter would have to be converted entirely into electrical energy in order to keep this city running for 14 weeks? (c = 3.0 × 108 m/s)
A. 0.19 kg B. 0.21 kg C. 0.26 kg D. 0.32 kg