Based from the given critical temperature values in the table, rank the following compounds according to the strength of intermolecular attractive forces. * 1- STRONGEST 3 4 5- WEAKEST Nitrogen Hydrogen Carbon monoxide Oxygen Methane What is the relationship between critical temperature and intermolecular forces of attraction? * Inverse O Direct O O O O O O O O O O O O O O O 2. O O O

5-25 A gas in a bulb as in Figure 5-3 registers a pressure of 833 mm Hg in the manometer in which the reference arm of the U-shaped tube (A) is sealed and evacuated. What will the difference in the mercury levels be if the reference arm of the U-shaped tube is open to atmospheric pressure (760 mm Hg)?

One of the chemical controversies of the nineteenth century concerned the element beryllium (Be). Berzelius originally claimed that beryllium was a trivalent element (forming Be3+ ions) and that it gave an oxide with the formula Be2O3. This resulted in a calculated atomic mass of 13.5 for beryllium. In formulating his periodic table, Mendeleev proposed that beryllium was divalent (forming Be2+ ions) and that it gave an oxide with the formula Be2O3. This assumption gives an atomic mass of 9.0. In 1894, A. Combes (Comptes Rendus 1894, p. 1221) reacted beryllium with the anion C5H7O2and measured the density of the gaseous product. Combess data for two different experiments are as follows: I II Mass 0.2022 g 0.2224 g Volume 22.6 cm3 26.0 cm3 Temperature 13C 17C Pressure 765.2 mm Hg 764.6 mm If beryllium is a divalent metal, the molecular formula of the product will be Be(C5H7O2)2; if it is trivalent, the formula will be Be(C5H7O2)3. Show how Combess data help to confirm that beryllium is a divalent metal.

In dry atmospheric air, the four most abundant components are N₂, X = 0.808; O₂, X = 0.1915; Ar, X = 9.34x10-5; and CO₂, X = 4.066x104. Calculate the partial pressure of CO₂, in torr, under standard atmospheric conditions. Submit Answer Tries 0/99 This discussion is closed. M CAL 8:00- 10:50- CI 12:00 Q ! 2 @ W OCT 21 F2 # 3 E 80 F3 $ 4 R 10 Q F4 % 5 T F5 A 6 Y F6 tv A S MacBook Air & 7 8 F7 8 DII FB ( 9 F9 O ) 0 J F10 F11 + F12 Send Feedback