NATS 1560 Lecture Notes - Lecture 3: Sodium Chloride, Organic Food, Chemical Reaction
26 Jun 2016
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Molecules: a stable structure, combination of few atoms. Covalent: atoms share a pair of electrons n2, strong bond, it is dif cult to break. plants need. Nding n used to be hard to nd and breaking n2 was dif cult to make n to nourish the plants. Polar covalent: (non- covalent), h2o, is electrically imbalanced. positive on two needs (n) and exposed and negative inside (o). Ionic: they are attracted two each other through sharing an e. one is negative and one is positive. Nacl: salt resolves in water cuz water is polarized and it breaks the nacl easily. Chemical reaction: re-arrangement of the atoms of the reactant into new molecules. Hacl + naoh => nacl + h2o shuf ing atoms. C12h22o11 + 12o2 => 12 co2 + 11 h2o. A catalyst: substance that is not changed by the reaction but facilities the reaction. Organic chemistry: chemistry of element carbon compounds, imbalanced carbon (?)
