Label this question as Q-UNK on your paper.  6 min. You must show your work as done in class.  Show starting equations and all work.  Use correct sig figs and units.  Circle final answer on paper. C = Carbon = 12.011 g/mol N = Nitrogen = 14.007 g/mol H = Hydrogen = 1.008 g/mol O = Oxygen = 15.999 g/mol An unknown drug compound is found to consist of 57.14% C,  27.21% O, 9.52% N, and 6.16% H by mass. A)  Using the information above, determine the empirical formula for the unknown compound?  You must use the method that was used in lecture to perform this calculation.  Show all your work.  Use correct sig figs and units. B)  Using your answer in Part A and the fact that the molecular weight of the compound was determined to be 589.01 g/mol, find the molecular formula for this unknown.  Again you must show your work as demonstrated in class including starting equations.  Place all final answers here with the appropriate letter and upload your work to the exam dropbox for grading.  

The total area between the irregular boundary and the traverse line is most nearly? (Please show all work as best as possible and type out anything that you would like to clearly articulate)

The most significant cash flows affecting ownership cost (outflows) are:

Earthwork computations involve the calculation of earthwork volumes, balancing cuts and fills, and planning the most economical material hauls.  On the diagram below, the volumes denoted by a. and b. in order to level the new surface between the retaining walls are referred to?

  Consider a reaction where aqueous solutions of Ca(CH3COO)2 and LiCO3 are mixed What insoluble precipitate is formed? A)  LiCH3COO C)  CaCH3COO D)  LiCa E)  Ca(CO3)2 F)  None of these choices is correct.   Choose the letter of the correct response.  

One (1) cubic yard of material after it has been disturbed by an excavating and loading process is measured in?

In heavy construction, for most cases, a piece of equipment does not work as a stand-alone unit.  Machines normally work in a linked production system.  This is referred to as?

The Construction Industry Institute estimates that Construction’s “Fatal Four” were responsible for more than half of construction worker deaths in 2013.  Which of the “Fatal Four” was responsible for the highest number of construction worker deaths?

The purchase price of a new tractor is $350,000 and it has an estimated useful life of 5 years. Determine the book value of the tractor for year 3 using the straight-line depreciation method.

Consider the following reaction: Fe2O3+ 3H2O