Multiple Choice
Multiple Choice
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 1 Which of the following is not characteristic of gases? A) have much lower densities than solids or liquids B) formation of homogenous mixtures regardless of the nature of gases C) retains shape easily D) high compressibility 2 What is the gas pressure in atmospheres of 485 cm Hg? A) 0.64 atm B) 33.0 atm C) 6.38 atm D) 5.50 atm E) 6.46 atm 3 What is the density of carbon dioxide at STP? A) 1.96 kg/L B) 1.96 g/mL C) 1.96 mg/L D) 1.96 mg/mL 4 A sample of gas occupies 3.00 L at 760 torr. Calculate the volume it will occupy at 1.45 atm and the same temperature. A) 4.35 L B) 2280 L C) 1572.4 L D) 2.07 L E) 0.48 L 5 A 14 g sample of N2 gas occupies what volume at STP? A) 5.6 L B) 11.2 L C) 22.4 L D) 14 L 6 A balloon has a volume of 1.5 x 103 L of helium at 1.0 atm and 25 oC. At an altitude of 21 km the temperature is -50 oC and the atmospheric pressure is 76.0 mm Hg. What is the volume of this balloon at 21 km? A) 8.9 x 10-5 L B) 1.9 x 102 L C) 1.5 x 103 L D) 7.5 x 103 L E) 1.1 x 104 L 7 The volume of an ideal gas is directly proportional to the number of moles of the gas at constant temperature and pressure" is a statement of _____________ Law. A) Charles's B) Boyle's C) Amonton's D) Avogadro's E) Dalton's 8 A mixture of three gases has a pressure at 298 K of 1380 mm Hg. The mixture is analysed and found to contain 302 mm Hg of CO2 and 722 mm Hg of CO. What is the partial pressure of Ar? A) 238 mm Hg B) 302 mm Hg C) 356 mm Hg D) 1753 mm Hg E) 8018 mm Hg 9 Which of the following best describes the bonding between atoms in metals. A) the transfer of electrons from one atom to another, producing charges which then interact with each other B) by sharing pairs of electrons with adjacent atoms C) by fusing the atomic nuclei to produce a continuous malleable array D) the valence electrons of a given metal atom are delocalized over all of the atoms in the piece of metal E) the fusion of the protons, neutrons and electrons to form a hard solid mass 10 Butter, like glass, melts over a range of temperatures, rather than with a sharp melting point. Butter might be classified as a/an: A) covalent solid B) ionic crystal C) metallic crystal D) amorphous solid E) molecular crystal 11 The boiling point of a substance is most strongly influenced by: A) the molecular weight of a substance B) the specific heat of the substance C) the melting point D) the strength/weakness of the intermolecular forces E) the amount of the substance involved 12 Viscosity of liquids typically increases when which of the following is considered, except: A) the temperature is increased B) compounds with ionic bonds are involved C) substances that can hydrogen bond are used D) longer molecules are used E) compounds with greater molecular weights are used 13 All of the following are intermolecular forces except: A) dipole-dipole interactions B) London forces C) covalent forces D) van der Waals forces 14 Which one of the following is not an example of a covalent network solid? A) diamond B) SiO2 C) Ge D) graphite E) none of the above