Write the electron configuration for phosphorus. If you do not use superscripts just put a space between each subshell. For example: 1s2 2s2…etc

Perform the following calculations, to the correct number of significant figures. a.   432.0 + 7.3 – 28.523 [A] b.   (455/400.1) + 1.379 [B]  

What is the molecular formula of a compound given the molar mass of the compound is 30.04 gram and the empirical formula is NH?  

For the molecule above, how many total sigma bonds and how many total pi bonds are there?  Type your responses below. total #  of sigma bonds = [s1]    total # of pi bonds = [p1]  

Extra Credit Problem!!!! You do not have to answer this question. It is worth 4 extra credit points. Chlorophyll, the substance responsible for the green color of leaves, has one magnesium atom per chlororphyll molecule and contains 2.72% magnesium by mass. What is the molar mass of chlorophyll? Do not include units with your numerical answer. 

Given the Haber Process for producing ammonia from nitrogen and hydrogen: N2(g) + 3H2(g)

How many grams of aluminum oxide are produced according to the reaction below given that you start with [x] grams of Al and [x]  grams of O2? Reaction:    4Al  +  3O2.  →  2Al2O3

Rank the gases: Ar, CH4, Br2, C3H8 in order of: Increasing speed of effusion through a tiny hole. Explain your answer.     2. Increasing time of effusion. Explain your answer.

How many moles of H2 can be made from the complete reaction of [x] moles of HCl? Given:    2Al   +   6HCl   →   2AlCl3.  +   3H2

Under the same conditions of temperature and pressure, ammonia effuses faster than hydrogen iodide.  Calculate how many times faster ammonia effuses.