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biological medium is water for earth- what is used to sustain
water molecule is a polar molecule: the opposite ends have opposite charges
-polarity allows water to form hydrogen bonds
properties that allow water to facilitate an environment for life ar
Biology is a multidisciplinary science
Elements and Compounds
-matter made up of elements
-elements substance that cant be broken down to other substances by chemical
-compound substance consisting of 2 or more elements in a xed ratio
10.1 Organic Compounds
An Organic Compound is
Typical Organic Compounds *water is a polar solvent
Organic vs. Inorganic
-Propane, C3H8 is an organic compound used as a fuel
-NaCl, salt is an inorganic compound
Organic compounds, are not soluble
(ex.Your a scientist and nd a cell that has DNA wrapped around histomprotein
in a nucleus. WHat kind of cell? )
3. via DNA, half from mom and dad and encode to genes
4. DNA molecule made up of nucleotides (ATCG) have 3 billion in cells
sequence of ATCG's
In this experiment you will observe the dehydration of a hydrated salt, and will calculate both the percent water by mass and the correct formula for the hydrated salt. By making sure the percent error is less than 5%; %Hydration Theoretical-%
Determination of empirical formula of magnesium oxide
Hypothesis: In this experiment we will determine the empirical formula of magnesium oxide by oxidizing magnesium ribbon with atmospheric oxygen in a crucible. Procedure: First we heat up the crucible t
Lab 1:Unknown Density from Mass and Volume Displacement
To know the density from mass and volume
3 unknown metals ( copper, aluminum , iron) . Weight balance . Graduated cylinder . 15 ml water .
1- We put 15 ml of water in