One hundred kg of dry air is humidified by mixing with 1 kg steam at 300C. Determine the partial pressure of the dry air and the steam if the total pressure is 100 kPa.
What will be an ideal response?
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It is easier to significantly alter Earth's O3 balance than its O2 balance because
A) O3 is a trace molecule in the atmosphere whereas O2 is not. B) it is so much easier to produce O3. C) O3 is a very unstable molecule whereas O2 is stable. D) O3 is a highly reactive molecule whereas O2 is inert. E) O3 is an inert molecule whereas O2 is highly reactive.
In essence, most of the extrasolar planets discovered to date have been found by
A) closely examining very high-resolution photographs of other star systems. B) observing a star carefully enough to notice that it is experiencing a gravitational tug caused by an unseen planet. C) identifying spectral lines that look like what we expect to see from a planet rather than a star. D) observing mini-eclipses of a star as an unseen planet passes in front of it.
The amount of energy needed to pull an electron completely away from the nucleus is called the Coulomb energy
a. True b. False Indicate whether the statement is true or false
The maximum elongation of a typical metal is reached at the
A) proportional limit. B) elastic limit. C) inelastic limit. D) breaking point. E) ultimate strength.