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Which of the following statements are true?  Choose all that apply.

A team of engineers and operators are bringing an alkylating unit into production for the first time.  The reaction converts toluene to propylbenzene by reacting it with ethylene according to the following reaction: toluene2propylbenzene.png After reacting, the product is piped over to a distillation unit, and the distilled product is stored in a storage tank.  If the team converts [t] pounds of toluene to product and collects [p] pounds of propylbenzene in the storage tank, what was the percent yield of the process?  You do not need to include a percent sign in your answer, just the number. (Hint:  the molecular weights of toluene and propylbenzene are given in the picture describing the reaction.  If you are clever about it, you don’t need any more information or to do any stoichiometry to find the answer.  You can still solve it with stoichiometery, but it will take a bit longer…)  

Calculate the energy required to heat [w] grams of water by 15°C.  Give your answer in Joules (units not required in the answer.)  The specific heat of water is 4.184 J / (g • °C).

Match the name with the formula for the following compounds.  Some formulas will not be used.

Choose the best answer to fill in the blanks of the passage.  Some answers may be used more than once, some may not be used. 1)__________________________ allows the determination of a quantity of a product or reactant in a chemical reaction equation on the basis of a given quantity of a different product or reactant.  In such a calculation, a mass can be converted to a(n) 2)_________________ by division by the molecular weight of the compound, then the ratio to a different compound involved in the reaction determined using the coefficients of the reaction equation.  However, in some cases one reagent may be a(n) 3)________________, such that there will not be enough of this material for the other reagents to completely react.  In such a case, the other reagents will be 4)______________________, and there will be some left over once the reaction is complete.

Atoms usually achieve a stable outer shell through ______________________ and/or _____________________________.

Match the following elements with the correct number of valence electrons for the neutral atom.

Classify the following reaction equation.  Choose all categories that apply. 2 Ca(s)  +  O2(g)  –>  2 CaO(s)

Calculate the energy of a photon with a wavelength of [x] nm.  Report your answer in J.

Match the following quantities to the number of significant digits.