CHEM 111

The chemical potential energy of bond A is greater than the chemical potential energy of bond B. Which statement best explains this observation? - Answer The atoms in bond A are held more tightly together than the atoms in bond B. Which statement about the bond energies of nitrogen, iodine, and fluorine gases is correct? - Answer The bond in nitrogen gas is the most difficult to break. Use the information in the table to answer the question. Bond. Bond Energy (kJ/mol) C-H 413...

Ionic Compound - Answer A chemical compound composed of cations and anions combined so that the charge is equal Molecule - Answer A neutral aggregate of two or more atoms held together by covalent bonds. Polar Bond - Answer A covalent bond in which the bonding electrons are more strongly attached by one of the bonding atoms creating a partial positive and negative ends. There is some degree of ionic character in this type of bond. Nonpolar Bond - Answer A covalen...

Spectroscopy - Answer The study of the interaction of electromagnetic radiation with matter Calorimetry - Answer Determining the changes in energy of a system by measuring the heat exchanged within the surroundings What is "alum"? - Answer A double salt combination of aluminum and a group 1A or ammonium sulfate Give two reasons why aluminum is expensive to produce and two uses for the alum compound that you synthesized. - Answer 1) It requires a lot of ener...

What happens to delta H when you reverse the equation? - Answer The sign changes but not the magnitude of delta H What must happen in an equation when multiplying by factor (n)? - Answer Must multiple delta H by the same factor What is the enthalpy equation? - Answer H=U+PV What is the system? - Answer Reactants and products (the reaction) What does delta H =? - Answer q (heat) What does q= - Answer s m delta T What is m? - Answer Mass ...

Resonance Structures - Answer Have the same relative placement of atoms but different locations of bonding and lone electron pairs Resonance Hybrid - Answer Molecules that can be depicted by more than one valid Lewis structure Fractional Bond Orders - Answer bond order= (electron pairs)/ (bonded-atom pairs) Formal Charge - Answer The charge an atom would have if all electrons were shared equally Electron Deficient Atoms - Answer Atoms that do not follow ...

molar volume - Answer the volume occupied by a mole of any gas at STP molar mass - Answer the mass of a mole of any element or compound atomic mass - Answer the number of grams of an element that is numerically equal to the atomic mass of the element in amu representative particle - Answer an atom, an ion, or a molecule, depending upon the way a substance commonly exists mole - Answer the SI unit used to measure amount of substance Avogadro's numbe...

What is the responsibility of the Lab Supervisor? - Answer -Writes quizzes -Maintains Canvas site -Enforces safety within the lab -trains teaching assistants What is the responsibility of the teaching assistant? - Answer -Holds office hours in the Learning Center -Grades lab reports and posts grades on Canvas -Enforces safety within the lab -Monitors students in the lab What is the responsibility of the student? - Answer -Prepares for class -Completes all assignmen...

Define Calorimetry - Answer measurement of amount of heat evolved or absorbed in a chemical reaction, change in state, or a formation of solution What does the E m c and delta T stand for in E=mc(delta)T - Answer E- energy c- specific heat constant m- mass or moles (delta T)- change in temperature Small calorie(c) compared to Food Caloire(C) - Answer 1c=1000C 1 calorie - Answer Amount of energy needed to raise temperature 1 gram of water 1 degree C When walkin...

Exp. 2 - Spectroscopy - Answer Define Spectroscopy - Answer Study of the interactions of electromagnetic radiation with matter Explain the difference between a line and continuous spectrum, and give an example of each source of light - Answer Continuous spectrum contains all frequencies within a region of the electromagnetic spectrum. eg. sun Line spectrum contains only certain frequencies. eg. neon lamp What kind of energy transitions were observed in this experim...