Question 1The “normal” number of covalent bonds that the element carbon forms is four.TrueFalse2 pointsQuestion 2Formation of a positive ion is the result of an atomlosing one or more protonslosing one or more electronsgaining one or more protonsgaining one or more electrons2 pointsQuestion 3The balanced equation Sb2S3 6 HCl -> 2 SbCl3 3 H2Stells us that:1 molecule Sb2S3reacts with 6 molecules HCl1 molecules of Sb2S3 will produce 3 g H2SOne mole of Sb2S3 will produce one mole of H2SNo enough information available to make any statements about the equation2 pointsQuestion 4How many total electrons are present in a P3– ion?2 pointsQuestion 5Elements in groups IIA and VIIIA of the periodic table possess respectively how many valence electrons?8 and 21 and 77 and 12 and 82 pointsQuestion 6How many total moles of atoms are present in 4.00 moles SO3?5 moles of atoms6 moles of atoms16 moles of atoms8 moles of atoms2 pointsQuestion 7Which of the following statements concerning double covalent bonds is correct?They are found only in molecules that contain P or atoms in the third period or higher.They are only found in molecules that contain large atoms that can effectively overlap with each otherThey occur only between atoms containing 2 valence electrons.They always involve the sharing of 4 electrons.2 pointsQuestion 8Number of single bonds in the Lewis structure for CH42 pointsQuestion 9A double covalent bond between two atoms is approximately the same strength as a single covalent bond between the same two atoms.TrueFalse2 pointsQuestion 10The compound 1-propanethiol which is the eye irritant released when fresh onions are shopped up has the chemical formula C3HyS and a formula mass of 76.18 amu. What number does the y stand for in the chemical formulas of the compound?81342 pointsQuestion 11What is the opposite of melting?2 pointsQuestion 12In which of the following pairs of physical changes are both changes enothermic?sublimation condensationfreezing meltingfreezing condensationmelting sublimation2 pointsQuestion 13What is the chemical formula for sodium sulfate?2 pointsQuestion 14The correct name for the ionic compound CuS isdicopper sulfidecopper disulfidecopper (II) sulfidecopper sulfide2 pointsQuestion 15Which of the following statements is not a part of kinetic molecular theory?Matter is composed of particles that are in constant motion.Particle velocity increases as the temperature increases.Particles in a system cannot transfer energy to each other.Particle interactions involve electrostatic attractions and repulsions.2 pointsQuestion 16A volatile liquid wouldhave weak attractive forces between moleculesevaporate “slowly” at room temperaturehave a low vapor pressure at room temperaturebecome a solid at room temperature2 pointsQuestion 17Which compound will most likely contain covalent bonds FeCl3 or NCl3?NCl3FeCl3bothneither2 pointsQuestion 18A 6.0 L sample of O2 at constant temperature and 3.0 atm is compressed until the new volume is 2.5 L. What is the new pressure (in atm)?1.00 atm5.00 atm7.2 atm12 atm2 pointsQuestion 19The correct formula for the ionic compound containing Al3 and Br- ions would beAlBr3Al3BrAl3Br3AlBr2 pointsQuestion 20What is the mass in grams of 0.034 moles of silver atoms?0.20458 x 1023 g3.7 g6.02 x 1023 g0.034 g2 pointsQuestion 21Which of the following molecules has a double dond?COSO3N2H4C2H22 pointsQuestion 22A sample of N2 gas occupies a volume of 375 mL at 25oC and a pressure of 2.0 atm. Determine the temperature in degrees Celcius at which the volume of the gas would be 525 mL at the same pressure.417oC1.28oC70oC144oC2 pointsQuestion 23Which of the following chemical equations is balanced?2NaBr Cl2 -> 2NaCl Br22SO2 2 O2 -> 3 SO3KClO3 -> KCl 3 O2N2 3H2 -> NH32 pointsQuestion 24Which phrase describes the gaseous state?Disruptive forces and cohesive forces are of about the same magnitudeDisruptive forces are significantly less than cohesive forcesKinetic energy dominates over potential energyKinetic energy is significantly less than potential energy2 pointsQuestion 25Which of the following statements contrasting covalent bonds and ionic bonds is correct?Covalent bonds usually involve two nonmetals and ionic bonds usually involve two metals.Covalent bonds usually involve two metals and ionic bonds usually involve a metal and a nonmetal.Covalent bonds usually involve a metal and a nonmetal and ionic bonds usually involve two nonmetals.Covalent bonds usually involve two nonmetals and ionic bonds usually involve a metal and a nonmetal.
