chem 111

• Which of the following uses an EXACT number?

  1. 5 goldfish
  2. 175 miles
  3. 78 Seconds
  4. 9.00 meters

  5 goldfish
• Carbon-12 and Carbon-13 are ________; they have different numbers of _______

  Isotopes; neutrons
• Which of the following is a physical change?

  1. animal fats melt into a liquid when warmed on the stove
  2. paper burns in air
  3. carbon reacts with oxygen to form carbon monoxide

  animal fats melt
• what does this picture represent?

  a liquid compound

  
• You have a measuring stick with markings every centimeter. Which of the following measurements made with that device is written correctly?

  1. 5 cm
  2. 5.3 cm
  3. 5.29 cm
  4. 5.333 cm

  5.3 cm
• How many sig figs in 0.05300 g?

  4
• The phase transition from liquid to solid is

  freezing
• Glucose is C₆H₁₂O₆. An individual glucose _____ is made up of ___. Gluecose is an _____.

  1. atom;molecules;element
  2. molecule; atoms; element
  3. molecule; atoms; compound
  4. none of the above

  none of the above
• Is this accuracy or percison:

  how close a measurement is to the true or accepted value

  accuracy
• Is this accuracy or percision:

  refers to how close measurements of the same item are to each other

  percision
• A proton has a ____ charge and is located ____. It has approx. the same mass as a(n) _____.

  positive, in the nucleus, neutron
• What element is correctly matched with its group?

  1. lithium- halogen
  2. flourine- alaki metal
  3. hydrogen- noble gas
  4. magnesium- alkaline earth metal


  4- magnesium - alkaline earth metal
• A horizontal row on the periodic table is a ____. The vertical collum is the ____. 


  horizontal=period, vertical=group
• Flourine is a _____ (metal, non-metal, metalloid), Lithium is a _____, and boron is a ____.


  Flourine= nonmetal

  lithium = metal

  boron= metalloid
• A drink made up of water, sugar, grape flavoring, and purple food coloring where everything is mixed up is ______ (heterogenus mixture or homogenus?)

  Homogeneous, items in mixture isnt visible
• The energy of a photon is _____ (directly, inversely) proportional to its wavelength and ______ (directly, inversely) proportional to its frequency.

  Inversly; directly
• The absorbance of infared (IR) light by gases, such as co2, makes these gases _____.

  Greenhouse gases
• if the reaction starts with 2 mols N2 and 4 moles H2, which statement is true after the reaction is complete?

  1. N2 will be left over at the end of the reaction
  2. H2 will be left over at he end of the reaction


  N2 will be left over at the end of reaction
• a substance that contains two or more atoms, from the same element, which are chemically joined.

  For example, hydrogen molecule (H2)

  .

  molecule
• A compound is a substance that is made up of two or more different elements that are chemically joined.

  For example, water (H2O)

  compound
• what orbital is this?

  S

  
• What kind of orbital is this?

  P

  
• what kind of orbital is this?

  A)

  
• Elements in a group have simiilar chemical properties because they have the same _______

  number of valence Electrons
• Attraction between opposite charges is the key principle in _____


  ionic bonds
• The effective nuclear charge of an atom is usually ____ than its nuclear charge due to shielding by the core electrions. Carbons Effective nuclear charge is _____ than borons

  smaller;larger
• Electron affinity is the amount of energy released when 


  atoms gain an electron
• according to Coulomb's Law, the distance between two charged particles and their total potential energy are _______ related

  inversely
• In the periodic table, the group of elements containing Calcium is called the..

  alkaline earth metal
• A ____ can hold up to 18 electrons, a ___ can hold up to 10 electrons, and a ___ can hold upto 2 electrons.

  shell n=3, 3d subshell, 2d orbital
• What kind of molucle is between a dipole-dipole force

  both polar
• List the 7 diatomic elements? (Have No Fear Of Iced Cold Beer)

  Hydrogen, nitrogen, Flourine, Oxygen, Iodine, Chlorine, Bromine
• Ion-dipole reactions are between _____ and ____ molecules

  ions; polar
• What one of three elements needs to be present for a hydrogen bond to form?

  Oxygen, FLourine, or nitrogen
• Which of the following are NOT considered greenhouses gases?

  1. oxygen
  2. water
  3. nitrogen
  4. agron
  5. more than one of the above are not

  more than one above are not
• If you place a cup of sugar to a quart of water in the process of making kooliad, you've prepared a _____ with sugar as the ____ and water as the ____.

  Solution, solute, solvent
• average speed of gas_____ as temp increases since and increased temp transfers _____ energy to the molecules. 


  increase; more
• Enthalpy is a ____________ because its value is ___________ the path of the reaction


  state function; indenpentdant
• Bond breaking is an __________ process and bond formation is an _______ process.

  endothermic; exothermic
• formation reaction


  A+B ---> C