Chem 230 Study guides, Class notes & Summaries

Metabolism correct answer: Sum total of all chemical reactions in a living organism Metabolism is a source of ________ for the functioning of the human body correct answer: energy Metabolism needed for many of the cellular processes such as correct answer: protein synthesis, DNA replication, RNA transcription, and membrane transport Plasma Membrane correct answer: Cellular boundary Cytoplasm correct answer: Water-based material of a eukaryotic cell Mitochondrion correct answe...

Many of the properties of water can be accounted for by the fact that correct answer: it is polar Compounds exist as a result of correct answer: chemical reaction In general, chemical bonding brings together elements in the correct ratios so that all of the atoms involved (except H and He) form a/an correct answer: octet What type of bond exists when valence electrons are shared between two atoms? correct answer: covalent bond What type of electron pair is indicated by the arrow ...

What is the symbol for a proton? P can also be replaced with an H What is the symbol for a neutron? What is the symbol for an electron? e can also be replaced with a β What is the symbol for a positron? e can also be replaced with a β What is the symbol for an α particle? He can also be replaced with an α What is the symbol for a gamma particle? What is the charge on an alpha ray? 2+ What is the charge on a beta ray? 1- What is the charge on a gamma ray? 0 W...

IR Spectra correct answer: -Absorption of radiation causes vibrational excitation of functional groups *making it easy to ID functional groups* *0-5000cm-1* H NMR Spectra correct answer: *0-12ppm* C NMR Spectra correct answer: *0-200ppm* Mass Spec correct answer: -Used to measure the molecular weight (mass) of the compound. Alkyne Reactions correct answer: *1* Alkyne + H2/Pd &C = Alkene *2* Alkyne + H2/Lindlav Cat.= Cis Alkene *3* Alkyne + Li or Na/Liquid NH3= Trans Alkene ...

What is the third law of thermodynamics? correct answer: The entropy of a perfect crystal is zero. What is the second law of thermodynamics? correct answer: As a whole, the universe always tends towards increasing entropy. What is the relationship between number of microstates and entropy? correct answer: More microstates = higher entropy What is the relationship between temperature and entropy? correct answer: Temperature increases, entropy increases (direct) What is the relatio...

Enzymes correct answer: Proteins that act as catalyst for biochemical reactions Are enzymes consumed in a reaction? correct answer: Not consumed during the reaction Majority of enzymes are correct answer: Globular proteins Enzyme activity is affected by correct answer: pH, Temperature, or concentration What do enzyme co factors do? correct answer: Provide additional chemically reactive functional groups What are the categories of co factor enzymes correct answer: Simple meta...

What is the principal form of benzoic acid at pH 8.2 if the pKa value is 4.2 correct answer: So, at pH 4.20, there is a 1:1 mixture of benzoic acid (HA) and benzoate ion (A-). At pH = pKa + 1 (= 5.20), the quotient [A-]/[HA] is 10:1. At pKa + 2 (= 6.20), the quotient [A-]/[HA] is 100:1. As pH increases, all the way to pKa + 4 the [A-]/[HA] is 10000:1 *The predominant form of benzoic acid at pH 8 is the benzoate anion For a monoprotic system, the species ___ is the predominant form when ...

Organic Chemistry correct answer: the study of the compounds of carbon Electronegativity correct answer: A measure of the force of an atom's attraction for the electrons it shares in a chemical bond with another atom -increases from left to right -increases from bottom to top Difference between EN < 0.5 correct answer: Nonpolar covalent; two nonmetals or a nonmetal and a metalloid 0.5<Difference between EN>1.9 correct answer: Polar covalent; two nonmetals or a nonmetal a...

Give the ground state electron configuration for I correct answer: [Kr]5s^2, 4d^10, 5p^5 Which of the following is a strong acid? A. CH3NH2 B. CH3O- C. H2N- D. CH3OH E. CH3NH3+ correct answer: E. CH3NH3+ A molecule of acetonitrile CH3Ch2Ch contains ____ sigma bonds and ____ pi bonds correct answer: 8 sigma 2 pi Which acid forms a weaker conjugate base? A. H3COOH B. H3CNH3 correct answer: A. H3COOH Which molecule listed below is a polar molecule? A. NH3 B. H2O C. HC...