The most reactive metallic element in this list is A) zinc B) calcium C) tin

Question #1 The most reactive metallic element in this list is A) zinc B) calcium C) tin D) copper.

Question #2 The element with the smallest atoms is A) magnesium B) copper C) tin D) chlorine

Question #3 Nonmetallic elements, such as bromine and iodine, are most soluble in A) nonpolar solvents B) distilled water C) salt water D) hydrochloric acid.

Question #5 Compounds with ionic bonds are usually formed from A) members of the same group B) two metals C) two non-metals D) a metal and non-metal.

Question #6 A soft compound, such as paraffin wax, with a low melting point which does not dissolve in water and does not conduct electricity has the following type of bonding A) elemental B) nonpolar covalent C) metallic D) ionic.

Question #7 The only substances listed that will conduct electricity are A) solid ionic compounds B) solid metals C) solid nonpolar covalent compounds D) melted nonpolar covalent compounds.

Question #8 The shape of the ammonia molecule , NH3, is A) bent(angular) B) trigonal planar C) tetrahedral D) trigonal pyramidal.

Question #9 The shape of the water molecule is A) bent (angular) B) linear C) tetrahedral D) pyramidal.

Question #10 The molecule with a symmetrical shape is A) ZnCl2 B) PF3 C) BBr3 D) CO2

Question #11 The polar molecule that has a positively charged end and a negatively charged end (referred to as a dipole) is A) N2 B) Cl2 C) CH4 D) H2O

Question #12 When a liquid, such as acetone, evaporates while on a towel in contact with a temperature probe, the temperature will A) increase B) decrease C) remain the same D) become equal to 100ºC.

Question #13 The compound whose molecules will be held together by attractive forces called hydrogen bonding is A) H2 B) HF C) C6H14 D) MgO

Question #14 The liquid with the strongest attractive forces between its molecules will evaporate A) the slowest B) the fastest C) at the same rate as all other liquids D) until it freezes

Problem #15 As the volume of a gas in a syringe is decreased from 20 cc to 5 cc, the pressure the trapped gas exerts A) increases B) decreases C) becomes equal to zero D) remains unchanged.

Problem #16 At STP, one mole of butane gas occupies 22.4 liters and has a density of 2.59 grams/liter. The mass of 1.0 mole of butane is A) 0.11 g B) 2.5 g C) 8.96 g D) 58 g

Problem #17 During an exothermic reaction, such as when Mg metal reacts with HCl(aq), the temperature of the surrounding water environment A) increases B) decreases C) remains the same D) becomes equal to standard temperature.

Problem #18 When Na2O powder reacts with H2O(aq), the product formed is A) Na metal B) O2 gas C) NaHsolid D) NaOHsolution.

Problem #19 If 8.25 g CaCl2 is dissolved in 100 mL of water, but it can hold 27.0 g, it is A) saturated B) unsaturated C) supersaturated D) oversaturated

Problem #20 • HBB(aq) + H2O(l) <==> H1+(aq) + BB1-(aq) • yellowblue • One way to produce more HBB is to • A) add hydrogen ions • B) add more water • C) remove hydrogen ions • D) remove BB1-

Problem #21 If a crystal of CuSO4 is dropped into a solution of this compound and it dissolves, then the original solution was A) saturated B) unsaturated C) supersaturated D) spectacular.

Problem #22 Crystals of NaCl can be formed from a saturated solution of the table salt by A) stirring the mixture B) adding sugar C) evaporating off the water D) adding more water.

Problem #23 If 4.0 mL of NaOH is needed to neutralize 10.0 mL of 0.100 M HCl(aq), then the M of the NaOH is A) 0.25M B) 0.10M C) 0.50M D) 0.40M

Problem #24 Hydrochloric acid is a very strong acid, which means that when the HCl is dissolved in water it A) completely separates into ions B) only slightly ionizes C) forms excess hydroxide ions D) raises the pH above 7.

Problem #25 Milk of Magnesia(MoM) contains an excess amount of large particles of solid magnesium hydroxide that eventually settle out of the mixture. Therefore the MoM is classified as being a A) solution B) compound C) suspension D) pure substance.

Problem #27 When gaseous organic hydrocarbons, such as methane, are tested with a burning wooden splint, they will burn to form carbon dioxide and A) water vapor B) hydrogen gas C) oxygen gas D) iodine vapor.

Problem #28 Iso-propyl alcohol, also called 2-propanol, is an isomer of A) acetone, also called propanone B) ethanol C) ethanoic acid, also called acetic acid D) 1-propanol.

When a gaseous product is collected in the lab and tested with a burning wooden splint, it pops(explodes). This indicates that the gas could be A) carbon dioxide B) water vapor C) hydrogen D) oxygen Problem #29

Problem #30 When a solute is dissolved in water, the property of the water that will increase is the A) evaporation rate B) boiling point C) vapor pressure D) freezing point

Problem #31

Question #33 If the [OH-(aq)] of a solution is 0.022 M, then the pH of the solution is: A) 2.2 x 10-2 B) 1.67 C) 12.3 D) 14.0 (C) pOH = -log [0.022 M OH-] = 1.67 pH = 14 - pOH =14 - 1.67 = 12.3

Problem #35 An original sample of a radioactive element had a mass of 10.0 grams. After 4 days, 2.5 grams of the element remains unchanged. The half-life of this element is A) 1 day B) 2 days C) 4 days D) 5 days.

Problem #36 Uranium-238 spontaneously releases an alpha particle in a process called natural decay to form A) plutonium B) radon C) lead D) thorium.

Problem #37 An original sample of a radioactive element had a mass of 10.0 grams. After 4 days, 2.5 grams of the element remains unchanged. The half-life of this element is A) 1 day B) 2 days C) 4 days D) 5 days.

Problem #38 If 16.3 mL of a sample of bromine gas are collected at a pressure of 5.00atm and a temperature of -25.0oC, the number of moles of this gas present are A) 0.00400 B) 0.0163 C) 0.0252 D) 0.0821

Problem #39 A 12 L vessel holds N2 at 2.8 atm and O2. The total pressure is 5.1 atm. The partial pressure exerted by the O2 gas is A) 12 atm B) 2.8 atm C) 5.1 atm D) 8.2 atm

The most reactive metallic element in this list is A) zinc B) calcium C) tin