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? 

Classify each of the following as a pure substance or a mixture. Fluorine (used to make fluorides, such as those used in toothpaste) Toothpaste  Calcium fluoride, CaF2, from the naturally occurring ore fluorite.

Write the chemical formula for a compound made from sodium and the phosphate polyatomic ion. Name the compound. Formula  Name  Is it an ionic or molecular compound? 

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

Regarding solutions, which statement is not true?

The derived unit for volume is much too large for practical use in many cases so it has been divided into smaller increments. Which unit below is not a unit of volume?