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What type of reaction is the following equation:  2 P + 3 Cl2 –> 2 PCl3  

Consider the reaction below:        4Fe + 3O2 –> 2Fe2O3   If 44.2 grams of oxygen react with an excess of iron, what mass of Fe2O3 can form?  (Fe2O3= 159.70 g/mol)   Must show all your work to receive credit- No work =no credit ( Hint: converting from gram of A to gram of B)

When heated, zinc and sulfur combine to form a new compound, zinc sulfide.  In this reaction, 

The orange color of a neon lamp results from an electric current being passed through a tube filled with neon gas.  If this light passes through a prism, the light divides into distinct “lines” of colored light.  This pattern is called the            of neon.

Lithium carbonate, Li2CO3, is commonly used to treat bipolar disorder.  What is the percent by mass of carbon in this compound (to the nearest whole percent)?

A photon has the energy 5.55 x 10-19 J.  What is this photon’s wavelength in nanometers? Answer in the correct number of significant figures.  You must show all your work and submit an image of your work to receive credit. Work must be in your own writing. 

This exam requires you to scan and submit Question 14  work and answer.  Extra time was given for this. Make sure your work is legible and done in your own handwriting.  If your work is not legible, then I will not be able to grade it and you will receive 0 points.   

 A photon has the energy  3.22 x 10-20 J.  What is this photon’s frequency?

That’s it! You should be good to go. Aren’t you happy you tried this out prior to the exam?

An atom lost all of 2 valence electrons resulting in a configuration of 1s22s22p63s23p2.  The identity of this ion is ___.