Write a balanced equation for the complete combustion of the following substance as shown below. If the coefficient is one put 1 in the answer block   C6H14 + O2 –> CO2 + H2O

Use your calculator to complete the following calculations. Give your answer with the correct number of significant figures.   36.6 / 0.0750                848.8 x 0.6250                (1.206 x 1013) / (6.00 x 106)       (27.001 – 12.866) / 5.000             

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?               

Which of the two objects or substances has the higher energy? Answer with a number, 1 or 2.   A methane molecule, CH4, in the stratosphere or A CH3 molecule and a hydrogen atom formed from breaking one of the carbon-hydrogen bonds in a CH4 molecule?   A water molecule moving at 1.63 x 102 mi/hr or the same water molecule moving at 1.81 x 103 mi/hr.   Iodine solid or Iodine gas (assume the two systems are at the same temperature)   A water molecule moving at 1.63 x 103 Mi/hr or a uranium hexafluoride, UF6, molecule moving a the same velocity.

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?