Chem 30A Ch.1-4: Condensed Chang’s Class Notes Chapter 1 Valence electrons octet rule exceptions P and S can have 10 or 12 valence e- B and Al (Group 3) can have 6 valence e- electronegativity- how much an atom wants e- < 0.5 = nonpolar‚ covalent (i.e. H2) 0.5 - 1.9 = polar covalent direction of polarity (using arrow and delta symbol) overall dipole > 1.9 = ionic formation of ions fish-hook arrow Lewis structure formal charge Functional Groups Molecular Shape VSEPR (Valence Shell
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LAB 1 POSTLAB REPORT (65 pts) 1. State the objective(s) of the lab. (5 pts) • To analyze the effects of specific liquids on a variety of materials • To observe potential hazards • To investigate the effects of strong bases‚ strong acids‚ acetone and bleach on a variety of materials which include sugar‚ cotton‚ nylon‚ hair‚ polystyrene‚ egg white‚ egg yolk‚ and aluminum foil. 2. Give a summary of your observations for each of the experiments. (24 pts) Sugar + H2SO4 Black clumped substance
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Physical and Chemical Change Objective: Recognize and distinguish between chemical and physical changes. Materials: - lab balance - microspatula - lab burner - dropper pipet - 5 test tubes - mortar and pestle - test tube rack - magnet - test tube holder - insulating pad - watch glass - safety goggles - glass square - lab apron or coat - copper sulfate pentahydrate - iron fillings - sodium chloride - magnesium ribbon - hydrochloric acid - paper
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Practice problems for CHE 101 final Approximate breakdown of points: Old Ch. 2: 10 Ch. 3: 15 Ch. 4: 15 Ch. 5: 15 Ch. 6: 15 Ch. 7: 15 Ch. 10: 15 New Ch. 8: 40 Ch. 9: 40 Ch. 11: 20 Final: May 3 at 11:45 am. Rooms posted on UBlearns Check your points entered on posted grade point totals. Keep all assignments. 1) For the following molecules‚ give the Lewis structures‚ the molecular geometry‚ hybridization‚ and whether the molecule is polar or nonpolar
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Pre Lab: Background: The Density of a material may be determined by determining the mass and volume of a sample material and calculating the mass/volume ratio. An independent variable is the variable that is being manipulated or changed during the experiment. The dependent variable is the variable that is being measured. The independent variable for this experiment is the copper because you are only changing the amount of copper you use. The dependent variable is the density because we are measuring
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DATED 09/01/2013 PRESS RELEASE CENTRAL DISTRICT GANG OF INTERSTATE CHEATS INVOLVED IN INTERNET BANKING FRAUD BUSTED : FOUR ARRESTED With the arrest of (1) Ajay Kumar Mishra‚ aged about 45 years s/o Parmeshwar Mishra r/o WZ-823‚ Palam‚ Village‚ Delhi‚ permanent address Add:- VPO& PS- Jainagar‚ Madhubani (Bihar)‚ (2) Binay Kumar‚ aged about 35 years s/o Harish Chand r/o A-166‚ Devali road‚ Khanpur‚ Delhi‚ permanent address
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Famous Sociologists 1. Emile Durkheim Emile Durkheim is knows as the "father of sociology" and is a founding figure in the field of sociology. He is credited with making sociology a science. One of his most famous pieces of work includes Suicide: A Study In Sociology. 2. Robert K. Merton Robert K. Merton is considered one of America’s most influential social scientists. He is famous for his theories of deviance as well as for developing the concepts of "self-fulfilling prophecy" and "role model
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Jimmy Carter was not the best president for a while he was known as one of the worst president but had later rehabilitated his reputation with humanitarian efforts. James Earl Carter Jr. was born on October 1‚ 1924‚ in Plains‚ Georgia. Grew up on a peanut farm that is father owned as well as a warehouse and store. James Carter became the first person from his father’s side of the family to graduate from high school. He then studied engineering at Georgia Southwestern Junior College before joining
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Sixty two years ago‚ my Grandfather found himself in a whole with his life. He was living in Genova‚ Italy with about one hundred dollars to his name. He had just gotten married to my Grandma‚ and was still living in his mother’s house at the time. He had no job‚ which means no money was coming in. Getting a job at this time was nearly impossible. Knowing that he had so much more potential‚ at such a young age‚ he decided to pack up and leave everything with his wife to start a new life in America
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When a really large unstable isotope changes into to smaller isotopes that are 2 completely different elements. the nucleus has to be larger than 230(mass). They are really slow and spontaneous. Fission = splitting. Can create a chain reaction. (picture above). Critical mass= must be enough mass in a reaction or enough fission type mass‚ fissionable mass‚ for the reaction to continue to go on.(minimum amount). Sub critical mass= mass of fission material that doesn’t have enough to keep the reaction
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