For the following equation determine the oxidation number for each atom in the equation and identify whether the reaction is a redox reaction or not. If the reaction is redox, identify what is oxidized, what is reduced, the oxidizing agent, and the reducing agent.   2Cr + 3CuSO4 –> Cr2(SO4)3 + 3Cu   Reactants Oxidation Numbers:   Cr         Cu         S            O           Product Oxidation Numbers   Cr         Cu         S            O           Is this a redox reaction?              If it is, what is element is oxidized?    What element is reduced?         What element is the oxidizing agent?            What is the reducing agent?               

The mass (in grams) of an atom is very small. The mass of the protons, neutrons, and electrons that make it up are smaller yet. In order to make these small values easier to use, chemists devised what?

The earth weighs about 1 x 1021 tons. Convert this to gigagrams. (There are 2000 pounds to a ton).

Write the names for each of the following compounds. CdI2  Ca3P2   Au(OH)3     FeCl2  

Write the names for each of the following compounds. ClO2   C2H6   HF  BrCl 

Are the electrons in the following redox reactions transferred completely form the atoms of one element to the atoms of another or are they only partially transferred? Answer partial or complete.   2K + F2 –> 2KF    2H2 + O2 –> 2H2O        Ca + Cl2 –> CaCl2        4 Cu + O2 –> 2Cu2O   

For the following equation determine the oxidation number for each atom in the equation and identify whether the reaction is a redox reaction or not. If the reaction is redox, identify what is oxidized, what is reduced, the oxidizing agent, and the reducing agent. If it is not a redox reaction, put NA those answer blocks.   2Na + 2H2O–> 2NaOH + H2   Reactants Oxidation Numbers:   Na        H          O           Product Oxidation Numbers   Na        H           O           Is this a redox reaction?          If it is, what is element is oxidized?    What element is reduced?        What element is the oxidizing agent?          What is the reducing agent?       

While you are at rest, your brain gets about 15% by volume of your blood. If your body contains 5.2 L of blood, how many liters of blood are in your brain at rest? How many quarts?   Liter    Quarts   

The Lewis structure indicates that methane assumes a tetrahedral molecular shape. Why is this true?

Write the chemical formula for a compound made from hydrogen and sulfur. Name the compound. Formula  Name  c. Is it an ionic or molecular compound?